"MINI would appear to need a 20-30 minute charge every 90 miles or so, so not disastrous anyway."
Bear in mind Mini would need a 50KW charger for the 20%-80% charge in 30 minutes. 50KW is the maximum it can use. To charge at home would take considerably longer. you would get roughly 30 mph charge on a 7kw charger and 10 mph charge on a 3 pin plug.
