Still haven't had the chance my friend, rubbish weather at the weekend and next I'm away on hols so I'm going to leave it for now.
I've not had them all illuminate up again, but have had on two occasions where I stopped on a hill (at cold, about 2 minutes from starting cold on a morning) and it wouldn't engage into gear (D was illuminated) and just revved until it 'found' the gear and off I went, no further problems.

So when I get back I'll try and find a dry day and get to it! Thanks as always for the offer on a read :-)