Winter storage facility near either Heathrow or Grays (UK)

[bfeng]

Guys,
I am looking for a good winter storage facility for my Sunbeam Alpine (1955). It has just come out of a full restoration, so indoor storage is a must.

I've found a few places using yahoo.co.uk, but they're all far from Heathrow or my UK vintage car pals (SS17 0PT). I did find one in London, but I was hoping to find a place with tariffs under 20p/w.

I would appreciate any recommendations for storage facilities.

Thanks to all in advance.

John Feng (bfeng7@yahoo.com)
P.S. Heathrow is my first choice so I can use the Alpine rather than rent a car when I visit the UK