@NoWordForFluffy We're with Octopus for dual fuel. They're not the cheapest, but they don't use bots to answer the phone and they don't bully you into accepting what they think your DD should be, e.g., we've been paying £144 pm, they wanted to increase it to £214 (even though we're currently over £300 in credit). No chance - and more importantly, no problem. We'll deal with the increasing costs once the credit is depleted.
Last year I sold a house I'd inherited. The dual fuel supplier was BG and they were an absolute nightmare to deal with, even though the house had smart meters and billing and consequent transfer to the new owners should have been straightforward. Never again.😱