K, well, predictably, GSF were shut tight. So I just returned the leads (tried to make a point of saying they were far too short and could i pass a note on, but the girl on the desk seemed more interested in chatting to her mate on the company phone about BB), got a maccy D's and chugged home. Over this fine and thankfully rare takeaway meal, god (or mum as i sometimes call her under my breath) mentioned there's a little car parts shop like the one Groovy knows nearby, so i may take a look tomorrow before setting out.
In any case if that doesn't work, I'm likely heading off to Derby to take a look at a "new" door tomorrow, so I'll zip past GSF before hitting the A38. Don't want to go all the way there with this nonsense going on! Their set of 4 is actually a good fiver less than anything halfords sell that has a chance of fitting anyway (pulled open a few packages and compared them to what I already have - which are actually as much in the direction of "too long" as the others were "too short" so i'd like something in between)... so I'm going for that.
Didn't know my distributor stuff got changed at service! Thought they lasted longer than that... guess not
£2 each for a plug and £2.50 for a lead, that's value in a bucket that is. Does it all work ok?
What I have is:
One set of leads, with (at least) one bad one. The others may be ok for now but could easily go wrong in a similar way. Kind of worried about how it looks though! like... melted... though there shouldn't be anything nearby that can make enough heat to melt them? crappy cables, or something getting too hot?.
Last time I changed the leads, I had a load of orangey things in there - the "Hotwires" you can buy in a set, or indeed singly from halfords for about £3.99 each. Got pissed off trying to diagnose a different type of misfire it had - on reflection a more serious but short-lasting version of this one - and after several things asked the local VW stealer (in bangor) about it. He took one look under the bonnet and told me to shove that hotwires sh**e (his words!) in the bin and either get new cables from him or tow it somewhere that sold them more cheaply. Well, I couldn't afford dealership prices, and the otherwise good nearby "motor factors" (ECP affiliate i think) was shut for refurb, so I went to halfords. That time too, the ones I chose didn't fit, so I swapped them out for some supposedly 1.3-suited leads (think i was still at the time under the impression i was possibly driving a misregistered 1300 because it
felt fast

)... expensive, a bit long, but fit right and worked like a charm.
Now the hotwires are possibly in a bag in the garage as last-ditch emergency spares if i didn't bin them, and the ones in are the only really functional cables i have. Will change all of them but hang on to the four decent ones. They have L-shaped bits at the dizzy end (the 1-litre ones mysteriously have straight bits) and metal sheathes at the plug end (the 1L plug connectors were also different on the inside - solid with a hole, rather than a 'floating' hollow plug-thing).
I'll have to see if no.2 lead gets worn out again in another 18 months, if i keep the beast that long

(if it does... well, no.1 might even fit, if not then certainly 3 or 4)