Found this interesting.
freewiretech.com
Essentially rapid chargers with a large battery buffer so they can sit on a “standard” supply, which removes the more extreme infrastructure requirements of rapids. I’m guessing they can probably also do some small amount of power trading with these too... maybe.
Of course they’re BP, so they’ll break and never be fixed.

FreeWire and BP unit ally for more UK fast chargers without grid upgrades - FreeWire Technologies
BP Pulse is working with FreeWire Technologies to get more of the company's fast-charging stations installed in the United Kingdom.

Essentially rapid chargers with a large battery buffer so they can sit on a “standard” supply, which removes the more extreme infrastructure requirements of rapids. I’m guessing they can probably also do some small amount of power trading with these too... maybe.
Of course they’re BP, so they’ll break and never be fixed.