British Gas

As its name suggests, British Gas is both British owned and based. It's still the biggest energy company, although it has been losing customers for a while, including more than 100,000 in autumn 2019.

It's a subsidiary of Centrica, a multinational energy and services company, which also owns utility suppliers in the Republic of Ireland and North America.

It's known as Scottish Gas in Scotland and claims to be ‘bringing Britain the smooth-running homes of today and tomorrow’. As well as gas and electricity, it also sells boilers, smart home products from the Hive brand and HomeCare insurance.

Its British Gas Rewards scheme gives customers personalised offers, which can include boiler services, Hive heating or lighting products, free energy days, and discounts at Waitrose & Partners and on Sky entertainment. 

Can British Gas save you money? Use our independent switching site, Which? Switch, to compare energy prices and find out.

British Gas customer score

British Gas came joint 27th out of 35 energy companies, as rated by 7,355 members of the public, in the annual Which? customer survey – the biggest independent view of energy suppliers. It was joint with rival EDF Energy.

Customers gave it OK ratings for many aspects of its service, although they don’t consider it good value for money, or rate its customer service or bills as well as rival energy companies.

British Gas score breakdown 

The graphic below shows the breakdown of British Gas’s score from our survey.

Scroll down to read our full verdict on British Gas, plus how its electricity fuel mix compares with the average across the country.

Find out how British Gas compares with other energy companies – click to see our full results of the best and worst energy companies.

Which? verdict on British Gas

Although it's the largest energy supplier in Britain, British Gas is neither the best loved nor the cheapest. Customers continue to leave it in their thousands, suggesting they’re looking for better service or prices elsewhere.

Customers consider it poor value for money – although it was among seven suppliers to receive this rating. It does sometimes offer cheaper fixed deals, but its out-of-contract variable tariff has consistently been in line with the maximum permitted by Ofgem’s price cap. Most of the biggest suppliers charge the same, however.

Switching away from a tariff at the level of the price cap to one of the cheaper deals available can consistently save a household using a medium amount of gas and electricity £300 per year, according to our research.

British Gas offers tariffs including 100% renewable electricity and designed exclusively for Electric Vehicle drivers (with cheaper energy for five hours overnight to charge your car). Some of its tariffs have exit fees of £30 per fuel if you want to leave before the end of the fixed term.

Some British Gas customers have stuck with it since privatisation. Our survey found that 41% of British Gas customers have been with it for five years or more. Some 14% of the British Gas customers in our survey said they had been with it for more than 20 years.

But loyalty doesn’t equate to high satisfaction levels and British Gas customers rated it an average three stars out of five for customer service. The best firms achieved five stars, while rivals Npower and Scottish Power’s customer feedback resulted in a poor rating for their customer service.

Our snapshot investigation into energy companies’ customer waiting times found it took 4mins 19secs, on average, to get through to a human in British Gas’ customer services. This was close to the average across all 36 firms included, which was 4mins 24 secs.

When we tested British Gas’s live chat, it took 7mins, 14secs on average to respond to us, making it the slowest firm included to respond. However, two firms failed to respond to live chat messages on most occasions.

British Gas’ highest customer rating was for how it handles complaints, for which it achieved a good four-star rating. Overall, 70% of its customers in our survey said it was 'good' or 'excellent' at dealing with complaints.

While this is in line with the average across suppliers (69%), the best firms had more than 80% of customers saying that how they resolved complaints was excellent.

According to official data, British Gas received 14 or 15 complaints per 1,000 customers in the first half of last year. This is half the number received by rival Eon – although it resolved only about half of them within two days, whereas Eon managed to resolve closer to three quarters.

British Gas has installed the most smart meters of any supplier, and the most second-generation models. It has an app which lets customers send meter readings, pay bills, set budgets and book repair appointments. It also owns Hive and sells its smart thermostats, smart plugs, smart light bulbs and smart locks.

Yet customers’ feedback only gave British Gas an average three-star rating out of five for its digital tools.

Pros: Handles complaints well according to customers.

Cons: Rated poor value for money by customers, one of the slowest to respond on live chat in our investigation.

British Gas electricity sources

British Gas in the news