As above FL crew have known about this problem for a long time, like Mick have only seen it once on a 75, having said that i have at several times i have had chance taken that part of the loom from diesel engines, i think i may have about 4 at the moment, below is the one for FL1 with the M47 engine.
https://www.island-4x4.co.uk/fuel-pr...20-p-6875.html
This would be no good for our 75 though.