I used the Osprey chargers at Banbury using Bonnet and worked perfectly, charging in no time at all. I think it depends on the age/type of Osprey charger.
Banbury has more chargers than you can shake a stick at which is why I chose it to stop at each way to Southampton and back.
6 150kW Ospreys, 12 Tesla, 8 Instavolts, a Geniepoint and a podpoint.
Those Ospreys were quick, I got 93kW and charged car before I could finish my coffee. ? but to answer the OP question, other than Bonnet, for the freebies,