M & C Diesels, Langham, 30 seconds from the A12 North Colchester.
They've done injectors and fuel pump on a mates Mondy and he was well pleased, another mate sent his Zaf there for a DPF delete and they said it didn't need it although they could have just done it and taken his money. My mechanic recommends them and sends bits and pieces to them.

http://www.mandcdiesel.co.uk/Site/mcajax.php