This sign was seen on a van parked in Partick. Wigan is a town in Lancashire (north west of England) known for its love of pies. A former colleague of mine was once on a training course in Wigan, and told the tale of being in the queue for lunch when the person in front asked for the pie. When asked what they would like with it they replied, 'pie'... pie and pie is, it seems a delicacy in those parts.
The same quirky humour is seen in this poster the Wigan council created regarding the wearing of face coverings... (it's good advice)