It seems that it wouldn't take much to make a hot ID3, just slap a bigger motor in (or an induction motor in on the front axle, and to hell with the range, but how hot is hot?
The 204PS Pro Performance seems to be on a par with a GTD, despite being about 400kg heavier.
To get an electric equivalent of an R, batteries definitely need to get smaller, lighter and cheaper, to get more in on a single car...and they will.
There's lots of new tech being touted (smaller, more energy dense battery cells that don't use rare earth metals, smaller motors that don't need permanent magnet), but most of that tech is at least 6 years away from going into commercial production from University invention.
Hopefully, by 2030 we'll see 350ps 4WD EVs that weigh 1400kg and have a realistic range of 400 miles for your £35-40k. The VW ID3/4 motor is already small enough to fit in a sports bag and weighs 90kg.
Still not sure how the Government is going to claw back all that money back lost to EVs in lieu of petrol/diesel VAT and duty. You could:-
1. Scrap that duty and VAT, and treat fuels like red diesel is currently and make everyone pay through the nose on toll roads.
2. Keep ICE cars filling and paying as normal, and make EVs pay per mile with ANPR/Black box.
The trouble is, you need to get everyone to want an EV, and right now the financials only make sense if you can charge at home (ideally on an EV specific 5p/kWh overnight tariff) and save big vs the pumps.
That's fine for those of us with off street parking, but for those that can't, they'll be paying diesel prices per mile on a 40-50p per kWh rapid charger- you'll end paying more than current ICE prices if you have tolls to pay for on top.