They were done at a delphi dealer / diesel injection specialist local to me, according to them, one was really blocked before cleaning and the spray was more of a dribble, Had them cleaned and made no difference.
Had a call from the bloke who's rebuilt my injectors yesterday saying that the control valves were all worn, two badly, the other two not so bad! Should have them before one o'clock today so will fit them later and take it for a test drive.
If anyone wants he's number pm me, done me a very good price and 3 day turnaround!