If you have a branch of Tyger in your neighbourhood they have some nice small Glue Guns in stock with 3 sticks of glue for a £5. They also do extra glue sticks or you can use the standard 7mm x 100mm.
Great price but unfortunately I don't think I I have one of those shops in my area. I may already have a glue gun come to think of it, but good news for those who haven't. Thanks for posting it up. Cheers Toto