Despite new VDO fuel pump, fuel filter, recent new VDO air mass unit, injector harness upgrade, ECU dry & clean etc My Disco 2 Td5 hesitates to respond and accelerate at bends and junctions after lightly breaking. Foot needs to go further down but not increasing revs too much before catch up. 175k on the clock. EGR not yet blanked. Relatively new hoses and all appear good. Any ideas? Could it be fuel regulator or injectors? Nowhere suitable inside to work on her so have to work outside.

sounds like you want to recheck swirl pot on pump

make sure the EGR is not clogged with muck and if it's EU 3 modell the CAT can be clogged too...then you won't have much power...also see if the turbo wastegate actuator is not stuck, you should be able to move it with a mole grips without applying huge power(but not very easy either)

Thanks Guys. The Turbo and waste gate are good. I'll check out the EGR although I must close it off. The performance drops after about 14 miles into country road commute. Idles good and revs responsively out of drive. Symptoms haven't changed even after the fuel pump change out and filter change. Chucking it down today so job for dry day.