Ok, thanks for the information.
Looks like I will get £350, plus the £350 I received a while back that was put away so not to spend it.
So together with that £700 and the new car payment of £750 I will have £1450 to put towards my new car advance payment.
Just got to find the right car, looked at a few online but most seem to miss things I need like, powered tailgate, heated steering wheel, electric handbrake and a infotainment system that I can use Android Auto on.
So favourites at the moment are the Qashqai E power or the Skoda Karoq. Just need to go and see them in the flesh.