My father in law told me he was due to change after July 1st so I told him to start looking for a new car now as he needs a bigger boot than his current Nissan Leaf for his new Mobility scooter.
He spoke to MB and they agreed to the early termination and the loss of his GCB (loss of £500) and he ordered an EV4 Air at £299 which he took almost immediate delivery of.
Now it has gone up to £1299 so he has lost £500 and the AP of £299 but gained on the AP rise to £1299 so by my Maths he is up £500 and now doesn’t have to worry about the July 1st changes.