I have just had a quick trawl through what I have on my netbook and came up with this which could have something to do with it.
British Caving Association
PUBLIC LIABILITY INSURANCE POLICY 2006: SYNOPSIS OF COVER
Underwritten by Brit Insurance Ltd via brokers RBPM General Ltd (Authorised by the Financial Services Authority)
1 The Period of Insurance runs from 1st January 2006 to 31st December 2006.
CONTINUES
6 The Policy also includes an "Indemnity to Others" clause which will provide an indemnity to any land/property owner with whom an insured member, or member organisation, with the full knowledge and consent of BCA Insurance Manager, has entered into an agreement or contract. (This fully indemnifies landowners who enter into access agreements for the crossing of their land, and/or the exploration of their caves.)
ENDS
If I am wrong on any of this I apologise to all concerned, but I have this from somewhere and only go by information I have been given, typically by email or documents downloaded from BCA website or forwarded to me by individuals. I am of course aware of the increase in policy cover from £2M to £5M
At this time I am unaware of where I got the £250,000 figure from, as I said I dont have everything to hand, it also appears from the above to be part of the policy.
I think clarification of the situation highly desirable.
My avatar is a poor likeness.