There has been some false information circulating about free gas/electric if you are self isolation.
The advice is (at 26/3)
1) If you have a key meter keep it topped up incase you need to isolate
2) Arrange for a family member/friend to do your top ups
3) If you have issues contact your supplier who will be able to support
4) If you are in financial difficulties contact your supplier. They may be able to defer payments
Further advice (which will be up to date)