Changed the final leaky spark plug tube today, and this time left a ferkin huge piece of plastic inside somewhere. Proper big bit. Ran the engine for about 45 mins, no probs.
Changed the pollen filter in the front boot, all that remains is an oil change and the service is done. Need to buy oil and a filter removal tool, once that lot is purchased this afternoon, I shall get that done. Job shall indeed be a good ‘un.