Price cap - a Labour suggestion that was derided by the Conservatives until it became expedient. Looks now that the Tories may have been right (never thought I'd say that). Still they implemented it anyway.
OFGEM will transfer you to another supplier, but the tariff may be worse, if your supplier goes bust.
https://www.ofgem.gov.uk/information...lier-goes-bust
My gripe is that most are foreign owned. EDF are French, EON and Npower are German, Scottish Power are Spanish.
SSE are part of OVO and they are British as is British Gas (Centrica).