9:th-Jul-2020, 22:09:50
So as a final conclusion, all is now sorted. The connectors are just a tight fit and pull off, but be very careful they dont break! Getting the glow plugs out was very easy, not tight at all. New ones fitted (Bosch 4 for less than £40 on internet) torqued to 15 Nm. And all is now well.
Thanks for everyone's help and support, cheers, Jeff.
Thanks for everyone's help and support, cheers, Jeff.