Each to their own. I think it will loose a lot of it's essential Betaness but it's still a style statement and if your local government is banning petrol cars from the city then it might be worthwhile. What county plates are those?
It would make a superb feature car for the NEC!
I'm actually quite interested to know how they will do it.
EDIT - From their website
"Our conversions start from £12,000 for a basic DC motor conversion using reconditioned parts. We recommend budgeting £20,000 or more for an appropriate conversion and other sympathetic upgrades" and "Affordability is our prime focus."
That's not quite affordability as I'd understand it!
They are Belgian export plates; as it happens, I know the car: it used to belong to a friend of mine who lives in Brussels.
Haven't checked their website yet, but... yes, that's a lot of money!
Personally, I wouldn't be tempted (yet - who knows what the future brings), but I find it interesting too.