We can't do much about reducing standing charges either, they cover the cost of new installations and maintaining the grid etc, and the cost of all of that has gone up due to inflation and lack of workers/ easy access of labour in those sectors.
If it was nationalised and we reduced standing charges, then that money would need to come from somewhere, so would likely come as additional tax (which is fine, if it's off the rich/ massive companies), or cuts to other public services like NHS, Schools, Highways, Councils or whatever. Obviously we all know who would take that hit in the current government, it would be the least well off, so they still end up paying either way. All of this is why we need those ***** out ASAP.
We can windfall tax the UK companies providing energy, but that would make them less competitive against those who aren't, and they also rely heavily on foreign imports which we have no price control over. I think we should still do this mind, and redistribute that to those who need it most, rather than using it to cut bills, but the Tory's won't do that. If you cut the bills across the board it's a tax cut to the big rich companies and people too.