Foggy - "How do You think We got guns up the hills in Italy? Big, long, heavy guns. Not by lorry, by a much more primitive form of transport.
Clegg - "British rail?"
That one cracks me up every time. Also in the same episode (The flag and its snag) Where Compo is on the wall and Foggy announces that it is staring them in the face! and turns to be facing Compos crotch LOL.