I've had a quick look but cant find one listed in the fuchsia society.
but some one will know.

Nope, no luck I'm afraid... sure it was 'winter...' something? Seems a bit odd because fuchsias are dormant in winter in the UK...

Could it be Winter's Tale'Look at http://www.thebfs.org.uk/textfiles/FuchsiaNewsWinter2016.pdf
There is no photo but maybe the description will ring a bell. I copied this from the website; Available from Little Brook Fuchsias, Percival's Fuchsias and Roualeyn Fuchsias. Winter’s Tale A new lax cultivar for baskets and hanging pots with mid to dark green foliage from Barry Flemming carrying on his tradition of white cultivars. The single flowers have a greenish white tube, white seplas held half up with reflexed green tips and a white quarter flowered corolla. Carol Gubler comments “probably the whitest fuchsia I know”. Available from Little Brook Fuchsias. There is a photo on their website http://www.littlebrookfuchsias.co.uk/Selection.asp?qry=C:Basket Cultivars&qryD=&qryS=&PageNumber=12
welcome to GOY

Someone on another site was showing a picture of a winter flowering Fuchsia. Will try and find it when we have been shopping.

Found it. Another one of these times when people use the wrong name for a plant.