Have had the misfiring problem sorted - had all the
replaced at a cost of just short of GBP 300. Still have the problem with gearbox - but cannot find anyone prepared to replace the pressure regulation solenoid - which is after all what is causing the problem. Had we the necessary skills and access to parts, we would do the job ourselves! Grrrrrrrrrrrrrr!
Best Wishes to all forum members
Lawrence and Hilarie