Definitely the MGA and the Austin Sprite in sports cars. Come on Tamiya, you've done the Morgan 4/4, and the Alpine. How hard can it be to do the MGA? MG is now a dead brand, surely the licensing rights can't be that expensive?
And in daily drivers, the Ford Anglia with the notchback rear window, and the Morris Minor (not the Mini).
I'd also dearly love to have any of the 1930s Grand Prix cars from Auto Union, Mercedes, and Alfa Romeo in 1/24.