Get Carter
The Long Good Friday
Brighton Rock
The Day of the Jackal
The Third Man
Tread Softly Stranger
The Italian Job
Coupier
Worth considering:
The Ipcress File
Funeral in Berlin
The Lavender Hill Mob (black comedy)
The Ladykillers (black comedy)
Traffik (mini series)
Edge of Darkness (mini series)
I still don't know whether I liked He Who Rides a Tiger, The Squeeze, and The Bank Job (great film poster, tho), but I recommended those to other people.