You're welcome, Jono.
A long, foggy time ago the Graun did provide interactive grids for the Genius, provided it was 15x15. Then they stopped. I've missed it ever since.
This forum group is a genuine treat, but I don't usually treat myself to it until after I've solved the puzzle and submitted,or have given up on both solving it on my own and submitting, or suspect there may be technical problem. This time it was the latter.
What a delightful surprise it was to see your grid in the first post...
...and then to be assured there was, in fact, a technical problem.
Your puzzle would have been a joy to solve even without the handy grid! 14d was a real groaner...
Now I'm off to enjoy the rest of the thread.