yes i linked LL to L and not to LT!. THANKS AGAIN.well i followed your advice i did indeed have 4 core flex! i now have the loop live to the comm then on to the L in fan, LT black from the fan to L1or L2 of switch removed black from rose to switch linked neutrals and after all that, it still does not work! now it appears the bloody fan is faulty unbelievable. i have had to order a new fan, fingers crossed guys, and thanks for your time.
Did you remember to link L and LL at the fan?