Injectors are quite new mate.

Tonight I got a kent vernier. I set the engine to TDC marks with the std cam pulley on. Removed it. Set the kent pulley spot on with the std pulley (woodruff mark together, then TDC mark together) and then fitted the vernier to the cam. Fitted belt back on and tensioned it and the cam timing was 5 degrees retarded at the std setting! So I set the vernier to zero and it ticks over MILES better, no popping etc. Smooth! So hoping a road test tomorrow shows the juddering gone. That will do then until I get time to have it all setup