I moved my electricity, Gas and solar export to British Gas at the end of May. It took 2 months for the gas readings to be correct on the bill,even though I gave them readings in May. They ESTIMATED my electricity even though they were given readings on the change date , along with the gas reading. I've called several times to give the readings again and they still can't get it right, even though they say they've updated the system each time I call. The whole nonsense with the smart export had me blowing a gasket as they keep telling me they need more information, even though they have it all and confirm they have it each time I call them, resulting in me not being recompensed for electricity I'm sending back to the grid. And considering I have 30 solar panels, it's no small sum! I would never recommend British Gas to anyone, they have been horrific to deal with and I still don't have my account right after 4 months.