Will post better details shortly but anyone interested
http://www.advancedelementskayaks.co.uk/product.php/543/advanced-elements-lagoon-kayak?
Used a handful of times ( this is the kayak I towed Olivia and Ewan around in for the few races we did)
I've used it and it's incredibly stable , tracks dead straight and comes with all the kit to get it on the water.
Comes with two life vests too.
£200 Ono