ROVER75 CDT intermittent cut out

HI.

I have a rover 75 CDT 2002 52 plate.

I've fitted under bonnet pump and in tank pump,both are purring nicely,but you could drive for maybe a week or 1 day and it cuts out, leave for approx 10 minutes and it starts may stop again after 100 yards repeat 10 minute wait and starts up may drive for who knows a hour, a week, had oil,fuel filters changed 200 miles or less ago.Has anyone got a clue as to what it could be.

Would appreciate any thoughts you might have as to what cause could be.

Thanks

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