To the left you can see the new bp member tariffs and how they are now tiered based on the charging speed, this was long overdue and while it is a increase in the cost of fast charging it was bound to happen and it is better than competitors eg: PodPoint who charge a flat £0.25p per kWh regardless of charging speed, for comparison here are more members flat rates : Osprey: £0.25p, Ecotricity: £0.30p, GeniePoint £0.35p, InstaVolt £0.40p and home utility prices: Octopus Go £0.15p
As you can see with this change AC charging at 22kW becomes almost as cheap as home charging during regular hours, i just wish all fast chargers would provide the additional slower AC charger at lower cost like this, PodPoint and Ecotricity fast chargers for example sometimes forego the AC port altogether.