Just to let you know of my progress, Cruciverbalist. I've completed the grid apart from 30d and the perimeter. I've also found the alternative mynydd spelling from UMW.
I'm in a very quiet satellite Lab tomorrow, with plenty of time to Google the remaining clues and to start on the TLS New Year Quiz.
I have also now managed to log on and complete the weekly TLS crossword, although I still can't submit crossword entries online.
Thanks again for the link to the Spectator Crossword, its now in my favourites !