Spoke to them today and they said im getting 4 bar at pump and 1 bar after regulator but asked if if changed regulator would this solve my problem and all he could say was its worth a shot. Then i asked about injector seals and said yes its possibly that but didnt want to disturb seal on new rocker cover gasket but can go down that route if i want, and hes supposed to be Land rover technician.
Sounds like a monkey- injector loom and seals would be first port of call.