When you decarbonise your home by going electric, you can save more money by going off gas completely so as to avoid the standing charge (the fixed annual charge). In my region, this can save up to £115/year but in some places you can save twice as much [1].
To avoid the standing charge you have to get your meter removed. The meter is owned by the supplier and you have to get them to do this – DIY or Fred Bloggs the engineer are not allowed. The supplier charges are highly variable, from £0 to £100s or even more. For example, this story Why does gas supplier charge £486 to remove meter when others do it free? (Guardian) details a charge of £486 to disconnect a Quaker Meeting House.
These charges are a disincentive to changing to a heat pump. Paying the annual fixed charge can tip the balance between paying more for low carbon heating or less. However, paying the meter removal charge adds to the upfront cost which is already steep.
Some recommendations based on actual experience.
I asked my friends (in Transition Cambridge Energy Group) about their experiences of disconnecting. These are all anecdotes and I have omitted names.