Thanks for the replies. It is not firing on all cylinders on tickover, but OK above 900 revs, that is the vibration due to erratic idling. As for filling the fuel filter, never heard of that, but will try. Actually the car was running fine until I used Diesel Magic, put one bottle in the tank just to keep the system clean. Not used Forte before, I will have a go with something. If I do need injectors, is the scrappy an option?

Before you go any further, take The Boy's, (and mine), advice - change the fuel filter.
Fill it with Forte Advanced Formula Diesel Treatment, a yellow-topped bottle. DO NOT USE their Specialist Injector Cleaner, (which also has a yellow top).
However, before doing this, try (difficult, but possible), tightening the filter when erratic idling occurs. I wouldn't mind betting that it'll idle perfectly thereafter.
Send me a 'PM' with your number this evening and I'll try talking you thro' it if you wish.
Regarding injectors - reconditioned ones are the only option in my opinion. Don't go down this road just yet .... 1