Funny thing is I do have a sump guard but it was in the boot at the time. I had only refitted it a couple of days ago but obviously hadn't tightened it up enough because during the trip across Exmoor it had worked loose and one of the other drivers pointed out I had "something flapping" under the car so I stopped and took it off (didn't have the bolts to refit) note to self "carry more bits n bobs"
The old filter did stick below the sump and I have a shorter one to fit, was on my to do list.
On a side note ive read a couple of old posts about Super Spec sump and the difference in depth, as my engine was destined for a 420 it should have the shallower sump but there was another post about the engines being destined for abroad so they had the deeper sumps, what depth are your Alan/Andy.
P.s like your sump gaurd Andy may redesign mine using treadplate .
P.P.S This particular speed hump is known about by locals because every car that stopped to ask if we were ok said I suppose you hit the speed hump.
I went over 1st one ok but the 2nd one was in shadow and not well marked and the wheels straddled it which meant the sump didn't.