Thanks for the replies.
The chargers that I have had problems with are all Type 2. Strangely they are manufactured by BP Pulse and branded as such but do not appear on the BP Pulse app. They are controlled by Chargeplace Scotland and appear on their app and on Zap Map as type 2.
Unfortunately Scotrail seem to have got BP Pulse to have installed all of their chargers so none of the chargers at any train station in Scotland is available.