Since many slag them off on here, a happy result for a change.
Broadband was working as normal this morning. Went out for lunch, and noticed an amber LED flashing on the TrueCall unit when I came back. No dial tone. And no broadband. Had noticed a couple of Open Reach vans at the end of the road where the cabinets are, so thought they were perhaps working on a known fault.
About 3PM I went to the end of the road to post a letter, and they were packing up. Asked one of the guys if I should now report the fault. He asked for the phone number and a few minutes later came to the house and plugged in a line tester thingie - then went back to the cabinet. Shortly after, all sorted.
Now I know they probably cause the problem by dislodging something in the cabinet, but to go back and fix it there and then after packing up was more than I'd expect. Nor would he take a 'drink' from me either.