Do not join British Gas. Why? 1) Increased my bills from Winter through Spring into Summer, even though I was using less energy (as we all do, due to it being warmer). Still waiting for a reply to my complaint on that one. 2) When I closed my account they did not even bother to update my bills with a final bill - the last bill showing in my account online is May 2020! So I don't know where I am with to see if anything else needs to be challenged. 3) Wanted to cancel my Home Cover with them, but you can't cancel easily (why not!?) but have to chat to someone online or by phone. Oh, but online chat is unavailable and the phones lines are impossible to through on. 4) Finally, a small thing comparatively, but their website is slow and badly designed. So, I will never switch to British gas again. It seems that it is often the case these that being a big company means being a bad one - too big to care, to big to be troubled if they alienate a few (thousand it seems) customers.