Hot-footed it over there, took her for a "spirited" five mile drive (well within the law ossifer), came back, ran the test immediately, and passed. Like Mat Ed30 says exhaust was not up to temp even if coolant reached appropriate temp on the idiot gauge.
...when I walked in the dealership the young lady (who doesn't know me enough it seems) asked if I wanted her to "get the parts on order"
Put some fuel cleaner in, new air intake, do it when the car is hot after a good hard drive , have it done there and then, not left for hours and then sorted.
Some dealers can be nobs. Failed my mates car for US DRLs because they "didnt know what they were " lol
Nah, they're a good dealers, I was late for my initial test slot and left it there to be tested so not their fault it cooled I guess, the chap who's run the MOT has run it for years past for me and he knew that I'd be over there to sort it out
I think it was just a case of the young lady in question not knowing me too well (she's new), once I turned up and she asked about ordering parts one of the old-timers laughed and said nope, he won't be needing anything...
Anyhoo problem sorted and MOT granted
thanks for your "advice" everyone
(looking at you Hedge!)