I found a page on winterising your car on the Mallock site.  Might be useful for us - I'm taking my XI off the road this Winter, as I only did a couple of trips in it last time and it was so cold it was not a  lot of fun!  
 
I can't link directly because of the flash menu, but you'll find the link under "Latest News".
http://www.mallocksports.co.uk/