Looks lovely & glad you’re enjoying it.
The BP Pulse (Polar) chargers, that was one of the 150kW ones & with the BP Pulse card they come in at 27p/kWh I think it is, used to be 20.4p/kWh until a few months ago.
There are also older slower BP chargers, usually in pub/restaurant car parks, they cost 15p/kWh using the BP card and will deliver up to 50kW which is usually fast enough. Just remember these are usually single chargers so no backup if it doesn’t work, although there are 8 of them at the Milton Keynes Coachway just off the M1 (shaded by the “mushrooms”) and some Ionity rather expensive chargers in addition.