There is no need to put Y H P M as the PM system works properly on this forum now, he will get a popup box saying he has a message
THIS should explain why you got the above message
Don't they have to warn you of speed bumps, might be a idea to check the road out to see if there are any signs, if not then get a picture of the unmarked speed bump and possibly put in a claim to the council
I had a uprated Exedy clutch & lightened flywheel fitted by APi engines and it cost about £650, takes about 4 hours by someone who knows what they are doing