I would find a good indy to do the work which will just about halve the costs. Cam belt should be done 10years and 90k do do it asap. Sounds like the clutch has gone, you could get a honda one or 3 party from the likes of LUK who supply many OEM clutchs. Door issue is maybe most painful if you want all the keys to match. I would say £700 all in from a good indy and avoid the likes of MR Clutch.

Agreed : cambelt, you are gambling. If it fails, the car is scrap. Must be done ASAP. Independent garage. First though, check what else should be done at the same time (some cars, the pulleys, rollers, even the waterpump). These might be included in the price, or might be extra. But not doing them is the ultimate in false economy

Clutch : independent garage. You shouldn't need a main agent to do it.

The lock ... that's the difficult one. You might be able to get the barrel fixed, but I really don't know.

One last thing : I know myself (and the other reply) have said to use an independent, but it might be worthwhile asking a main agent to quote for the job. Sometimes, they can be surprisingly cheap.

Surprised the Honda lovers haven't been on yet telling you that Honda's never go worng and if they do Honda will repair them totally FOC even after the warranty has long expired.

But I guess this proves that they only go on threads where other brands have issues and try and rub in the fact that Hondas are far superior.

As for your car it will cost a few £'s to sort but that will be way less than buying another motor and suffering depreciation and the risk of buying a lemon.

IMHO if its in reasonably good condition get the faults sorted and keep running it.