Thanks for the advice all.
I will spend some time on it this weekend and let you know any outcomes... if any.... as myself and spanners are not the best of friends... it usually ends up with wrapped knuckles and lots of explitives
Just a slight concern, in the recent slightly warming conditions my young cargo in the back were getting warm so from the front I impressed them with the ability to turn their cool air fans on from the front. Only to be met with DAAAAD! it is blowing hot air out!!!!