Fixed Penalty Notice for parking on double yellow lines?

Illegally parked George VI Letter Box

I could not resist photographing this George VI Letter Box found not far from Coventry Railway Station with a Fixed Penalty Notice 'randomly' stuck on it.  Just made me laugh.  (Now for those of you that don't know it, this is basically a 'ticket' for minor parking offences.)  I wonder if this ticket will be contested in court.