We use (and love) the Lucas PAS stop leak here at work so there was only one option after looking on Lucas website!
I wish I could buy every product on the website!!
Can do pal no worries, i mean tbh i bought it on ebay from a guy in Ireland anyway:
LUCAS TRANSMISSION GEARBOX FIX STOPS SLIP 710ml FLUID | eBay
It was mainly for a geezer on lr4x4 who is having hunting/fast idle problems and his engine doesn't stall when you block the intake, but it gives me a handy heads up that there is a little leak in my valley also.