Our 2001 1.8 TDdi Focus has oil pressure issues which I think is the pump but would value a 2nd opinion.

From cold it is fine but when warm the oil light will flicker at idle. I have obviously done an oil and filter change, dropped the sump and checked the pick up and changed the oil pressure sensor. Am I missing anything else or am I down to swapping the oil pump?

Car has done 190k but I have own from new and new oil and filter ever 6k so she has had good care taken of her.

Thanks all.