HI everyone
Just joined the forum after my first read through of all the clues. I got far more answers from my first read through than normal, but no "pairs". Thank you Mikey and Chris for giving a broad hint for 26ac. I'd googled sea snail and got nowhere. I'd never heard of it.
I'm off for second read-through now and will be back for some hints later. I'm relieved to hear that the "pairs" are of equal length.
Is 18ac an anagram? If so I can't find it.