Switching electric companies in London is one of the most effective ways to cut costs, access better service, and align with your energy valueswhether that means going green, going digital, or simply going cheaper.
With dozens of suppliers available, the key is knowing which ones are worth the switch. Below is a detailed look at the top 10 electric companies in London that make switching smart, seamless, and genuinely beneficial for households and businesses alike.
Why should Londoners consider switching electric companies?
Switching electricity providers is no longer a tedious process filled with paperwork and uncertainty. For residents in London, it has become a practical and often financially rewarding step. The increasing diversity of providers in the market gives consumers more control over how much they pay, how their energy is sourced, and the quality of service they receive.
Financial Savings as a Strong Incentive
One of the most common reasons to switch is to cut costs. If you haven’t reviewed your energy plan in over a year, there’s a high likelihood that you’re overpaying sometimes by as much as £300 annually. Many households remain on expensive standard variable tariffs simply because they don’t realise better deals are available. Switching allows you to select a tariff that matches your lifestyle and budget.
Sustainable Choices and Greener Energy
With climate concerns growing in urgency, more Londoners are opting for providers that offer renewable energy. New and emerging companies are pushing the green agenda, offering electricity sourced from wind, solar, and hydro. Choosing a green tariff not only reduces your personal carbon footprint but also supports the UK’s transition to a sustainable energy grid.
Better Customer Service and Digital Tools
Many newer energy suppliers are disrupting the industry with improved customer support, mobile apps, and user-friendly account management portals. Unlike traditional companies, they are not weighed down by legacy systems, allowing them to offer a more responsive and intuitive customer experience. Whether it’s real-time billing, chat-based support, or smart meter integration, these innovations provide clear value.
How can you effectively compare electricity tariffs in London?
Choosing a provider isn’t just about picking the one with the lowest advertised rate. Londoners need to consider several pricing and service variables to ensure they make the most beneficial choice for their household or business.
Understanding the Components of Tariff Pricing
Every electricity bill in London typically consists of two core charges: the standing charge and the unit rate per kWh. The standing charge is a daily fee to keep your home connected to the grid. Meanwhile, the unit rate determines how much you pay for the electricity you consume.
| Pricing Element | Description | Typical Range (London) |
| Standing Charge | Daily fee for grid access | £0.35–£0.45 |
| Unit Rate | Cost per kilowatt-hour (kWh) | £0.28–£0.34 |
Even small differences in these charges can result in large savings or costs over time. It’s critical to understand your energy usage patterns and calculate the estimated annual cost based on your habits, not just the advertised rate.
Knowing the Tariff Types and What They Mean
Londoners typically choose between fixed-rate tariffs and variable-rate tariffs. Fixed-rate deals offer a consistent price throughout the contract period, making them ideal for households that want predictable bills. On the other hand, variable-rate tariffs adjust according to wholesale energy market prices. These can be more volatile, but potentially cheaper during market downturns.
Hidden Fees and Exit Penalties to Watch For
Many fixed-term contracts include exit fees if you switch before the end of your agreement. These fees usually range between £30 and £60 per fuel. Make sure to verify your current contract’s terms before making a switch. Fortunately, Ofgem regulations allow consumers to switch providers without penalty during the final 49 days of a fixed term.
What should Londoners know before changing electricity suppliers?
Switching energy suppliers may be quick and easy in practice, but a thoughtful approach ensures that you’re making the right move. Several key elements should be reviewed to prevent surprises and maximise the benefit of the switch.
Reviewing Your Current Plan and Usage
Before comparing deals, gather information about your current plan. Look at your annual electricity usage, typically listed in kilowatt-hours (kWh) on your bill. Understanding your consumption is essential for accurate tariff comparisons, especially on price comparison websites where tailored quotes are offered.
Assessing Contract Status and Switching Windows
If you are on a fixed tariff, check whether you are still within the contract period. Most energy suppliers will notify you 42 to 49 days before your contract ends. During this window, you can switch without paying exit fees. If your deal has expired, you’ve likely been moved to a more expensive default tariff.
Making Sure Your Home is Smart Meter Compatible
Smart meters are rapidly becoming the standard across the UK. If your home has a SMETS2 smart meter, it will continue to function regardless of which supplier you choose. If you’re using an older model (SMETS1), some features may temporarily stop working when you switch, although most providers are working to resolve this interoperability.
What are the top 10 electric companies to switch to in London?
1. Octopus Energy – “The UK’s Most Loved Green Supplier”
Octopus Energy has carved out a strong position as one of the UK’s most customer-focused and eco-conscious electricity suppliers. Known for its transparent pricing, digital-first approach, and 100% renewable energy tariffs, Octopus uses proprietary tech to simplify account management and maximise customer value.
Their “Agile” and “Go” tariffs are among the most innovative in the market, giving customers access to wholesale prices and EV charging benefits. The company is also recognised for its commitment to carbon neutrality and has received multiple awards from Which? and Trustpilot for its service.
Unique Offering
Pioneers in flexible tariffs like Agile, which tracks real-time wholesale rates.
Tailored Customer Fit
Ideal for tech-savvy users and EV owners looking to optimise usage costs.
Pricing:
Standard fixed rate ~£0.28/kWh, standing charge ~£0.39/day (varies by location)
- Website: www.octopus.energy
- Phone: 0808 164 1088
- Address: 33 Holborn, London EC1N 2HT
- Email: hello@octopus.energy
Review: ★★★★★
“Finally, an energy company that feels like it’s on your side. Easy to use app, and real savings!”
2. EDF Energy – “Trusted. Reliable. Responsible.”
EDF Energy is one of the UK’s largest and longest-established energy suppliers, offering both residential and business electricity plans. It is well regarded for its reliability, extensive smart meter rollout, and comprehensive fixed-rate deals. Backed by France’s nuclear energy infrastructure, EDF also supports green tariffs powered by wind and solar. Their digital platform offers account management and energy-saving tips, while customer service is delivered from UK-based call centres, enhancing trust and accessibility.
Standout Feature
Backed by large-scale low-carbon and nuclear infrastructure.
Ideal Match
Perfect for households that prefer stability and established brand assurance.
Pricing:
Fixed rate tariffs from ~£0.29/kWh; standing charge ~£0.41/day
- Website: www.edfenergy.com
- Phone: 0333 200 5100
- Address: 90 Whitfield St, Fitzrovia, London W1T 4EZ
- Email: customer_correspondence@edfenergy.com
Review: ★★★★☆
“No surprises on my bills and helpful service when I switched. Slightly pricier but worth it.”
3. British Gas – “The Original Energy Provider”
British Gas, part of Centrica, remains one of the most recognised names in UK energy. It offers a wide range of plans including dual-fuel and home service bundles that include boiler cover, maintenance, and smart thermostat integration.
With a robust online platform and one of the largest customer support teams in the country, British Gas combines traditional service with modern tools. Despite criticism for pricing, it remains a strong choice for customers valuing bundled services and national coverage.
Key Capability
Offers full home energy servicing alongside electricity supply.
Recommended For
Best suited for older or less tech-savvy customers who want everything in one place.
Pricing:
Fixed tariffs average ~£0.31/kWh with £0.42/day standing charge
- Website: www.britishgas.co.uk
- Phone: 0333 202 9802
- Address: 1 Rivergate, Cardiff CF11 7JL
- Email: customercomplaints@britishgas.co.uk
Review: ★★★★☆
“Great for boiler cover and energy combined. A bit pricey, but convenient.”
4. E.ON Next – “Next Generation Energy for Modern Homes”
E.ON Next, a rebrand of E.ON’s residential division, focuses on sustainable energy and a personable digital experience. All electricity is 100% renewable as standard. They’ve invested in user-friendly account dashboards, fast switching, and UK-based customer service that prioritises quick resolutions. Their pricing is competitive for a big name, and their transparency makes them a reliable player in the market.
Defining Edge
Green electricity comes standard with every tariff—no extra charge.
Target Audience
Well-suited for environmentally conscious households who value user experience.
Pricing:
Typical rate ~£0.30/kWh with a £0.42/day standing charge
- Website: www.eonnext.com
- Phone: 0808 501 5200
- Address: Westwood Way, Westwood Business Park, Coventry CV4 8LG
- Email: hi@eonnext.com
Review: ★★★★☆
“App is slick, switching was painless, and they’re green too – it ticks all the boxes.”
5. OVO Energy – “Energy With a Conscience”
OVO is one of the largest independent energy suppliers in the UK and a leader in carbon-conscious initiatives. All plans include 100% renewable electricity, and the company funds carbon offsetting for gas usage. OVO is well known for its tree-planting initiatives, straightforward pricing, and commitment to sustainable innovation.
It appeals to customers who want to do more for the environment without sacrificing cost.
Differentiator
Carbon-neutral energy plans with community sustainability projects.
Best Matched To
Ideal for eco-minded consumers who want a socially responsible supplier.
Pricing:
Fixed rates from ~£0.29/kWh, standing charge ~£0.39/day
- Website: www.ovoenergy.com
- Phone: 0330 303 5063
- Address: 1 Rivergate, Temple Quay, Bristol BS1 6ED
- Email: hello@ovoenergy.com
Review: ★★★★★
“Love that they plant trees in my name! Billing is simple and support is fast.”
6. So Energy – “Simple. Green. Honest.”
So Energy is a challenger supplier with a laser focus on clean, uncomplicated energy. They offer a single, clear tariff at a time and promise competitive pricing on 100% renewable electricity. Transparency is at the heart of their service, and they consistently rank high in customer satisfaction. Though smaller in size, their support team is highly responsive, and the switching process is streamlined and stress-free.
Distinctive Advantage
Focused simplicity with just one or two clear tariff options.
Perfect Customer Type
Great for those who want no-fuss green energy without comparing 15 plans.
Pricing:
~£0.28/kWh, standing charge around £0.38/day
- Website: www.so.energy
- Phone: 0330 111 5050
- Address: 107 Power Road, London W4 5PY
- Email: help@so.energy
Review: ★★★★★
“No gimmicks, just clean electricity at a fair price. Customer service is spot-on too.”
7. Shell Energy – “Big Energy, Smarter Living”
Shell Energy combines big-brand reliability with an evolving set of energy tools. They offer dual-fuel tariffs, broadband bundles, and EV-friendly plans. Their smart home options include discounted thermostats and battery storage solutions.
All plans come with renewable electricity, and Shell has made significant moves into the residential market since acquiring First Utility.
Competitive Benefit
Integration with smart home tech and broadband services.
Right Fit For
Homeowners interested in bundling energy with digital lifestyle features.
Pricing:
~£0.30/kWh with standing charges near £0.40/day
- Website: www.shellenergy.co.uk
- Phone: 0330 094 5800
- Address: Shell Energy House, Westwood Business Park, Coventry CV4 8HS
- Email: customer.service@shellenergy.co.uk
Review: ★★★★☆
“Nice to have broadband and energy in one bill. Tech options are a real bonus.”
8. Bulb (Now part of Octopus) – “Green Energy Made Easy”
Bulb was a green energy pioneer in the UK before being acquired by Octopus Energy. While no longer open to new customers directly, many still receive service under the Bulb brand. They offered one simple tariff, 100% green electricity, and were known for excellent digital experience and clear pricing.
Recognised Strength
Early leader in transparent, renewable energy for everyone.
Audience Match
Appeals to those who appreciate a minimal, user-friendly service.
Pricing:
~£0.29/kWh, standing charge ~£0.39/day (now migrated to Octopus terms)
- Website: www.bulb.co.uk
- Phone: 0300 30 30 635
- Address: 155 Bishopsgate, London EC2M 3TQ
- Email: help@bulb.co.uk
Review: ★★★★☆
“Sad they’re gone, but Octopus seems to be handling the transition well. Still happy!”
9. Utility Warehouse – “Bundle Up and Save”
Utility Warehouse is unlike traditional suppliers—it bundles energy, broadband, mobile, and insurance into one monthly bill. They operate on a membership model, and their prices are often competitive if you opt for multiple services.
While the interface is more old-school, customers appreciate the convenience of consolidated billing and dedicated personal support agents.
Standout Element
Multi-service bundles beyond just electricity and gas.
Ideal Demographic
Suited for older customers or families wanting one-stop service.
Pricing:
Varies depending on bundled services; energy-only tariffs from ~£0.31/kWh
- Website: www.utilitywarehouse.co.uk
- Phone: 0333 777 0777
- Address: Network HQ, 508 Edgware Road, London NW9 5AB
- Email: support@utilitywarehouse.co.uk
Review: ★★★★☆
“Love having everything on one bill. It’s old-fashioned in a good way.”
10. Good Energy – “Powering a Cleaner Future”
Good Energy is a truly independent supplier that not only sells but also generates renewable power. Their electricity is sourced directly from UK wind and solar farms, and they’ve earned the trust of environmentalists for their clear ethical policies. Although not the cheapest, the company offers unparalleled transparency, with published data on where their power comes from.
Unique Selling Point
They generate their own energy from local UK sources—not just trade certificates.
Best For
Eco-purists who want a transparent, ethical electricity provider.
Pricing:
Premium tariffs ~£0.33/kWh, standing charge ~£0.41/day
- Website: www.goodenergy.co.uk
- Phone: 0800 254 0000
- Address: Monkton Park, Chippenham SN15 1GH
- Email: customerservices@goodenergy.co.uk
Review: ★★★★☆
“A bit more expensive, but worth it to know exactly where my electricity comes from.”
Which is better: fixed or variable energy tariffs in London?
The right choice between fixed and variable tariffs depends on your budget preferences and risk appetite. In a city like London, where energy demands fluctuate seasonally, the decision should be based on a clear understanding of each option.
Fixed Tariffs Offer Stability
Fixed-rate tariffs are excellent for those who prefer consistency in their monthly bills. They shield you from price hikes caused by wholesale market spikes and provide financial certainty for 12, 18, or 24 months. These are especially attractive during periods of rising energy prices.
The Flexibility of Variable Tariffs
Variable tariffs follow market pricing trends and can sometimes be cheaper than fixed tariffs. However, this approach carries a risk if energy prices spike unexpectedly, your bills will increase accordingly. They’re better suited for those comfortable with a bit of unpredictability or who plan to switch often.
How do smart meters support efficient energy use in London homes?
Smart meters have revolutionised the way Londoners interact with their electricity consumption. These devices record your usage in near real-time and send the data to your supplier, eliminating estimated bills.
The Benefits Beyond Accurate Billing
Smart meters help you understand exactly how and when you’re using energy, which is the first step in reducing waste. With detailed insights provided via mobile apps and online dashboards, you can take control of your usage and make adjustments that lead to real savings. Most providers in London now offer free smart meter installations as part of their switching package.
Are there any fees or risks involved in switching electric companies?
Switching is generally low-risk, especially if you’re not locked into a contract. However, it’s important to be aware of a few financial considerations.
Expect in Terms of Costs
Some fixed deals include exit fees, and these should be clearly stated in your contract. You may also incur a brief overlap in billing during the switch, but this is rare and usually resolved automatically. Also, be mindful of changes to your direct debit setup when moving to a new supplier.
| Fee Type | When It Applies | Estimated Cost |
| Exit Fee | Early switch from fixed-term | £30–£60 |
| Standing Charge | Daily grid access | £0.35–£0.45 |
| Dual Billing (rare) | Overlap during switch | Usage-based, typically resolved |
Is switching electric providers disruptive to service?
Absolutely not. Switching providers does not affect the actual flow of electricity into your home. The infrastructure wires, meters, substations remains exactly the same.
When you initiate a switch, your new provider contacts your old one. You’ll be asked for a final meter reading, and the rest is handled behind the scenes. There’s no need for an engineer visit, and your power won’t go out at any point.
FAQs About Switching Electric Companies in London
Can I switch providers if I live in a rented flat?
Yes, tenants can switch suppliers if they are the account holder, even without landlord approval.
Do I need to cancel my old electricity account manually?
No. Your new provider handles the entire transition, including account closure.
Is there a limit to how many times I can switch providers?
No limit exists, though fixed-term deals may come with exit fees.
Will I lose credit if I switch before my billing cycle ends?
No. Your existing supplier will refund any overpaid balance once your final bill is settled.
Can I switch both electricity and gas together?
Yes, many providers offer dual-fuel packages for added savings and simplicity.
How long does the switching process take?
Most switches complete within 5 working days under the Energy Switch Guarantee.
Are there trusted websites to compare suppliers?
Yes, use Ofgem-accredited comparison sites like Uswitch, Compare The Market, and Energy Helpline.