Two friends leave the pub. One says to other, 'I can't be bothered to walk all the way home'.
'I know, me too but we've no money for a cab and we've missed the last bus home.
We could steal a bus from the depot.' replies his mate. They arrive at the bus depot and one goes in to get a bus while the other keeps a look-out.
After shuffling around for ages, the lookout shouts, 'What are you doing? Have you not found one yet?’ 'I can't find a No. 91'
'Oh for goodness sake, ye thick sod, take the No. 14 and we'll walk from the roundabout. :)