Lennox's film is carefully constructed, ballasted by sterling performances from his two leads - neither of whom you would call attractive or empathetic.

There's a good movie here about the peculiar bond between men of different social strata, but Lennox and his screenwriters, John Cairns and Michael McCartney, never quite locate it.

The film is infuriating in its predictability, right down to its poetic but preposterous climax.

There's nothing really new in A Patch of Fog, just a sharp little thriller that escalates well before its devious conclusion.