And a good morning to you too Martin
It is something I'd love to do but never seem to have enough spare gas in a lump sum to arrange it. A number of ZS180's have been converted to LPG over the years, MGR even offered the 120 with LPG. The most common KV6 conversion has been the Freelander.
My best advice would be to shop around, don't just go with the cheapest or the nearest or the quickest. Have a search around
www.lpgforum.co.uk , chap on there by the username of Tubbs seems to have a lot of experience.
James