Howard,
Yes it is the high pressure fuel pump from tank to injectors with and a return line direct back into tank for surplus fuel at low revs. Its this return line that has failed twice!. When it fails there is fuel every where just pumping high pressure fuel all over rear of car/ This last failure was only partial and I left a trail of fuel for half a mile as I dashed home.Bearing in mind proximity of tank to exhaust its a bit scary!. All approaches to Morgan for solution or parts failed.