I’d order the Volvo.
I’d be very surprised if the EQA makes it onto the scheme, and if it does.. The plugin hybrid A-Class currently sits at £5600-£6000 AP. The government grant for EVs does not apply to the EQA either (base price is £43.000-ish – it’s £50.000 as premium plus).
I don’t think it’s coming to the scheme, and if it does, it’ll probably be very close to five digits in AP.
More likely (but still not that likely, i don’t think) would be the lower range model of the Enyaq IV, which would, if i’m not mistaken, qualify for the government grant (i think it’s £34.000 ish?) – bringing the price down to something that you could see on the scheme.
I’m by no means knowledgeable though.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.