Roy Circles is a games teacher who used to be in the army and suffered shell shook when his tank was blown up many years ago. He is also a chocolate finger. Roy often talks about his wife who died five years ago and reminisces about playing tennis with her in their garden. It's not clear as to whether Roy is actually a games teacher, or whether it is a delusion he acts out in his own mind.
Roy Circles is probably the character closest to something that Spike Milligan would do in as much as he is on the edge of madness. Many of his tales are military based and I'm pretty sure a lot of Roy Circles comes from my own love of The Goons.