A Sign of Humour is a Glasgow-based artist who specialises in creating humourous signs of various descriptions and other guerilla art installations which are erected in a variety of public places. The aim of these installations is to encourage people to take an interest in their surroundings, and to add a bit of humour to everyone’s day. You can find details of their latest works by A Sign of Humour on their social media pages on Instagram , Facebook and Threads.