Check with the BMC in England http://www.bmcinsurance.co.uk/index.htm to see what their policy covers. You can also check Travel Underwriters in Canada http://www.travelunderwriters.com/ but their gear coverage is limited. Also, check with your home insurance company to see if they cover anything or if you can get additional insurance.

BMC is OK if you live in the UK.

www.ihi.com cover climbing and expeditions, can be easily bought online and are cheaper than most.

D