Thanks for the replies guys. He has got a manual wheel chair to go about in but unfortunatly due to his medication he has to be near a toilet as much as possible so although a 'spotters car park' is a good idea i dont know if it would work.
Unfortunatly this illness is not treatable and will only get worse with time, i hate to say it but leading to only one conclusion, so just wanted to give him a treat for his birthday.
Yes i will write to the station commander and see what he says.
Merry Christmas everyone!!!