I was a mechanic for 45 years and I don't think you know how lucky you are, when a wheel comes off like that it usually damages the fender. I have seen it cause thousands of dollars in damage, so it could have been worse.The thing with the rear brake shoes is they should have been arced to fit the drums,that way you have most of the shoes making contact with the drum.If they don't fit properly your stopping power will be reduced, and possibly a low pedal.I don't have a lot of experience with British cars except it takes a special breed to work on them.There are still some machine shops around that will arc your shoes if you still are having problems.Good luck.