There,s a few out there i know,the red lion car park is a bit bumpy, but i like that place so they are exempt. 
The winner is the exit of M4 membury services west bound Ta Daaaaa 
My poor back
Our yard might win that award. They’ve taken a bite out of my bumper and quite a few mud wings and spray flaps been torn off other units and trailers these past few weeks.
The bloody big pothole as you come out of knutsford south nearly need a map to get out of that 1,glad I know it’s there wouldn’t fancy finding out the hard way in the dark 1 night.