I was castigated by heathrow ATC for an alleged zone infringement, they called up and bollocked me for flying through Northolt whilst en route to Denham. The guy was very insistent that it was me and became very aggressive and threathening when I said it wasn't.
I "confessed" and put the phone down despite the fact that I had been to Blackbush via Wycombe and reading and my passenger had video of the route.
Made me realise that they don't always get the right "blip" and they sometimes do get it very wrong. If you are accused ask for the radar track as evidence and demand to see conclusive proof that the radar blip is your aircraft !