Welcome Hounds, I remember my first with fondness. There have been some crackers along the way, and this forum is very much part of the fun.
There are some fine minds here. They won't give you the answer, but they might just give you some hope.
Prospero, I believe, has done them all, which may be an unique achievement...
In the early years it required an extra subscription to The Graun, so uptake was low and correct entries often numbered in the 30s according to the newsletter.
And still Comrade P remains ungarlanded with the £100 cheque. So, crossword Gods, either an eyes-wide-open dip into the hat, or a lifetime achievement gong would seem to be in order