Nigel, Lindisfarne is correct for 18. 6 was meant to be a trick question, with Aberdovey as the obvious but wrong answer. Unfortunately I relied on memory and made a geographical mistake: I thought Harlech was south of Aberdovey. So you are perfectly right, I accept Aberdovey, though I was aiming for Swansea (as in Bells of Rhymney).