Thank you all for your kind encouraging and immediate replies ! My daughter is 12, the Cherub will be a boat to grow into and we would sail on the right days condition wise, my lad is only 8. My earliest memories of sailing were being lifted into the front end of a cherub after a race, looking in awe at that giant daggerboard going down the case, it being cramped up front with Dad's crew too and bursting into tears if we went out too far, the edge of the world being the end of the giant blue storage building on the nearby quayside ! It didn't totally freak me out, I haven't needed counselling in my adult life to get over it either
I pestered my Dad to build me a Cherub when I was 13, he relented and knocked up a Spencer Mark 7 number 2518. I struggled with the spinni pole and was too light, this gave the old man the excuse to dig out his old crew for a season or two. I did helm on a few occasions swapping after races and managed a race or two, this got my confidence up but alas along came windsurfing (this is all early '80's), I had another Spencer 2nd hand for a bit of fun when I was 15, but sold her as she was rotten, then got hooked into catamarans.
My father is Pat Webb, I think he simply called his design Webb1, I met a guy at Grafham Water at a cat open many years back who had a Cherub of an Unknown design, when I enquired he said a Webb 1 ! I'll have to check out the sail numbers. Dad set up Dolphin Sails with Brian Vincent (former Cherub Champ) for the first 8 years of the companies history, he built Cherubs on a semi professional basis. I'll tap Dad up for some more stories.
If you guys can come up with some other options to consider, who knows, there may be one not too far away from here, I will ask the owner of Catananche for some more details too. Thank you all for your kind offers of help.