The car suddenly has no power but the engine does not stop. I have to pull over quickly turn the engine off and then wait about 10 seconds. When I restart the engine the accelerator revs as normal. Sometimes it can happen twice on a journey.

Then nothing for a week or so. When I travelled to London I had covered
nearly 200 miles on M6 and M1 then all of a sudden it had no power in the accelerator - not very convenient when I hit the road works at junction 12 of the M1!