I am most grateful to you, Bunty. I thought I was going to do without the EV this week, as the grid was clearly no use and the preamble seemed obscure. Then I thought of looking at this forum, copied the grid and looked at some clues. Eventually things began to make sense, and indeed to promise a lot of fun, so thank you!
What can they do now to help people who are not aware of this great asset? I think they should reproduce the correct puzzle in tomorrow’s Telegraph and in next Sunday’s ST. With apologies, of course.