In reply to thecruxclimber:
AAC - austrian alpine club (section britanica).
yearly membership costs around £40 and gives pretty decent rescue and repatriation cover but no travel cover (stolen gear etc). It lasts for a callender year so your best getting it now. also gives good discounts on many alpine huts.
except at a select few crags you dont need any insurance for climbin/mountaineering in the UK, but basic BMC/MCofS membership gives you 3rd party liability cover incase someone wants to sue you!