We've just got back from Horsley, Surrey cc&c site which i think has storage. It certainly looked as if there was a fenced in area with carvans being stored.
It took me ages to find a storage site for my caravan. I live near Reading in Berkshire and ended up near Southampton, about 47 miles away! I have been on a waiting list and finally got on to a storage site about 4 miles from home. There was one nearer to my house but the monthly fees were silly money. Try looking under the Cassoa listed storage sites on the web.
------------- "A.C.L. - Three ways to tackle a problem. Accept it, Change it or Leave it."