I must be honest I have never understood why uk has always been much more expensive for a new car than europe. the subsidies have no bearing as this is a direct subsidy to the end user, doesn't affect import.
Import duty on a new car is the same 10% uk and 10% spain. in fact should be dearer in spain as VAT here is 21% wher'as it´'s if i remember correctly "only 20%" in uk.
In fact you would expect UK to be cheaper as there are more cars sent to UK than here so I would have thought ecconomies of scale would have a bearing, but no. a uk trophy is listed at 31,495 pounds at todays exchange rate thats €36,255 and at its present state of the uk eccomomy that rate means the price would be closer. Yet here you can have the Luxury your trophy for €34,280, like €2,000 cheaper and our "trophy has 11kw ac charger and a Heatpump as standard"
But I imagine the real reason is because they can, pure and simple.