Update,
He came round yesterday and couldn't remove the bolts. All 3 wheels came off albeit with some hefty force...
The front wheels is still on & he's coming back round today with an electric gun to remove the bolts and take out the 2 broken ones. One thing I have noticed since he's fitted the wheels & bolts. When I'm driving I can hear a slight grinding / metallic scraping as if the bolts have went too far Into the hub and are scraping against something? Is this actually possible?
Happens more on full lock to the right whilst reversing (the front right is the side where the bolts are stuck)
Hopefully the bolts remove relatively easy, not sure whether I should be paying him to remove the bolts and broken bolts as most likely he's the cause of them being stuck and broken!! Makes it even worse that I know him and he's a nice guy