They did. When G-ALZS slid off the end of the runway on 14 Sep 1967 it was on a charter back from Luxembourg. If memory serves, it had a local WI on board and the poor dears had to get off in the mud! Fortunately there were no injuries.
If you goggle the reg you can find a pic by airpixbycaz of it being broken up on the apron after its mishap.