Wow, thank you all for the amazing advice. Two (or a few) heads really are better than one; you all made salient points I hadn’t thought of. The most obvious being the fact that if it does take a year that is 250 x 12 months — how silly of me not to think of it this way !
And I did spot the Norwich driving schools, for some reason, you have quite a few up there! Especially intensive ones. I am only in Cambridge so not too far.
Thanks for all the advice !