Back in 1979 as young Kiwi doing my OE I was working at LBA and got to ride in BMA Viscounts a number of times going down to London....I remember one day seeing the 10am flight from LHR arrive on a very wet and grey Leeds days....from my office window this one seemed to be going far too fast landing RWY 32....it was!!! took to the grass rather than go on to the busy Leeds-Harrogate road....as soon as it went onto the grass(it had been raining for a few days) the L/H gear collapsed and props on that side dug into the soft ground flinging grass & mud into the air...it swing about 45 degrees facing the runway and all pax and crew left the Aircraft without a scratch...and a few months later another went off the end of RWY 14 (this was before the runway was extended) I dont think Viscounts liked wet runways....One of New Zealand NAC (National Airways Corp) Viscount went off the runway at Wellington....can't remember what caused that one....but the sound of a Dart is something else.