All fixed now 
Openreach blokey found the fault was 184m away when he tested at my master socket.
Apparently fault in cable somewhere between nearest cabinet and my master socket. So he routed a spare line to my master socket.
He said it took him longer to complete H&S checks than it did to climb the telegraph pole and switch the wires over 
He's just left, 2 hours after he arrived!
Checked the router and its gone from 4M download to nearly 14M......which he reckoned was pretty good considering how far i am from the exchange and the exchange is 20M max
Lazy breakwit - in my day, we'd be in and out of all the joints finding it. Presumably he used a mole to get the distance, easy enough to pace it out. The moles are really accurate once you get to know 'yours'. I once measure a fault (from both ends) on a 3.8km run of buried cable. Threw the spade in the ground where I measured to, bounced straigt off the joint
(funnily enough, that was also a day where my mate Rik (see Kwaka thread) and I were arsing around
)
It was a handheld device, that he clipped onto the wires.....it gave a reading of 184m.
Are you trying to tell me, that if the cabinet had spare capacity and you had other AM calls that day, you would start digging the pavement up and let BT pay for missed appointments 
Ah, one of the new moles, not the bloody great things we used to have to lug about, with CRTs in.
Correct. Only time we'd swap pairs was E side (exchange to cabinet), as the cables were pressurised (and in my day, many E sides still had sections with paper insulation, which got a bit grumpy when wet

).
There was one job in Aylesbury, where my mate Rik (he does get about, doesn't he) and I had a earth fault on a buried estate. Out with the Megger, measured, dug, tried again. And again, and again. About a week we were there before the tosspot manager would send out a proper underground bloke to help us (the street looked like The Somme with all the holes).
First this the underground bloke asked was where we got our Meggers from. "The old man" (meaning the manager), we replied. "Oh, these were the ones we handed back to him, as they are known to be faulty". <Send the word censor mental>.