Like many others, and after some research, I've switched my electricity supply from Octopus Flux to Tomato Lifestyle. Initially, I planned to stick with Octopus for gas on their Flexible Tariff, but when I compared options, I found that British Gas is now the cheapest gas-only supplier for my needs.
If you're considering switching to British Gas, feel free to use my referral link – we both get a £35 Amazon Gift Card if you do! Choose Gas-only when switching. THANK YOU! https://refer.britishgas.co.uk/daniela-10958