I felt that the films central core dealt with the relationship between Combo and Shaun, that's where the tension, character arcs and the fantastic pay-off come from, plus Stephen Grahame's portrayal is inch perfect. The other characters although interesting, were peripheral.
This is where the TV series seems to be failing, there is no punchy narrative, no tension, the characters progressions have changed from the film. It neeRAB Stephen Grahame's character in now to lift it from the mundane lethargy and faux comedy that it is currently wallowing in.