More commonly known as Tony: London Serial Killer this is one of the best British films of recent years.
Peter Ferdinando gives an award-worthy performance as the unassuming loner with a dark secret.
It's very well written with nice slices of everyday life thrown in and you never know what is going to set Tony off next.
I gave this a full review a while back so click the serial killer label for that. In the meantime check out the trailer.