Great stuff Slinky, thanks!
Okay, some sort of short angled driver recommended for carbs - at least I know where to look now (yet another use for that dentist mirror I use for checking oil
Will have another crack at the centre plug - basic metric socket set now on birthday wish list, along with replacement torque wrench

(don't ask)
Thanks for the re-assurance on the mechanical pump - . might check the switch as you suggested - just in case, agree in good old blighty weather is unlikely to get over hot - but London traffic a common occurrence for me (another reason I came back to a bike)
mmm. not so happy about the possible damp problem - I guessed it twern't normal - reading another thread suggests I might have a 'thingy' missing

I will pop over to Boyers and sneak a look at their t-birds on Friday -
But are the ignition coils/wiring on right underside side of tank supposed to be that exposed?
Probably just me, but it seems a bit messy in comparison to rest of wiring & quality of build in general. I also noted the connections to coils weren't exactly tight - I even accidental disconnected one when removing the tank (and I wasn't exactly yanking at it - in fact quite the reverse)
Methinks next item might be general checking of connections and some light dispersant might be in order - I hope that is all it is cos otherwise will be bloody hard thing to test properly as it is almost intermittent -
I've been caught in rain half a dozen times (already - as would be expected), but she has only stuttered like that twice -
The first time I pulled over and a few rev's (while I checked the bleeding obvious like Is the fuel tap on?) seemed to clear her - Then yesterday she did it, after she was parked outside a friends (and it dropped the sky on her)
I checked the exhaust (for pressure) which is how I know it was 2 or 3 but all three downpipes were about same temp - So I switched her off and tweaked the coil/HT connections again looking for obvious stuff - but they seemed okay so I started her up for further diagnostics and she was fine - I am only saying damp cos that was the one thing that I could attribute to both occurrences.
And yes I am paranoid - just me I guess - sometimes reminds me of an old OGRI cartoon with Malcom panicking about the slightest rattle

I ain't quite that bad, but when you've been left in the middle of no-where with no phone and a 20 mile hike to the nearest house - because of something you probably should've noticed - (maybe not, but you always wonder) it kinda leaves a mark on you.
slightly off topic, but I note by the book of receipts that the recent services were done by a BMW dealer, and to be honest some of the re-routing here and there was not exactly how she was meant to be (even my untrained eye could see that). Silly little things I know - but things that stand out when you are paying attention to detail & I still had to re-do them myself anyway (i.e. choke cable not sat in the proper seats on the carbs, messy routing of HT leads etc., ) If she'd been mine when they were done I would've had a thing or two to say to the mechanic involved.
but thanks again mate and sorry to be a BOF - I owe you a coffee