Trainspotting Easter Egg - Shallow Grave's Dead Lodger

Is this the origin of the mysterious lodger in Shallow grave?

The drug dealer who buys the drugs off the four "heroes" in the London hotel room is played by the same actor (Keith Allen) who played the dead lodger in shallow grave.

Nothing remarkable in that, however he is wearing the same clothes in both films, the lodger in shallow grave is obviously connected with the underworld and the case the money is carried in is the same in both films.