Denham is pretty tight with a Seneca. I'm the first guy to take twins into short strips for utility, so I'm not blaming this gentleman at all. This is well within it's capabilities. You just need to plant it early, can't afford to be too much off speed or have a rwy too wet and/or brakes not in great shape. Glad everyone is OK - airplanes can always be replaced.
As a side note, it bugs the living daylights out of me that if I ever get my plane over to Europe for that summer vacation flying I dreamt about doing, I can't get into Denham, Elstree or pretty much anywhere else with this new one. I'm confined to Biggin Hill and the boringness of all that.