We’re a fully electric home, having storage heaters, immersion heater for hot water, and ceramic core electric heaters in some of the smaller rooms.
We enquired about an ASHP before we upgraded our old storage heaters to HHR variants but, as there is currently no radiator system in the house, it would mean getting all that installed along with the plumbing before an ASHP would work. Both messy and expensive then there is the ASHP costs on top.
Air to air heat pumps are available but our walls are a meter thick in places making that too a difficult installation.
As it stands we get enough heat from our current setup and, with solar and a battery, have shifted over 90% of our electricity use to off peak.