In reply to PW:
Bear in mind that you can only really charge different premiums for people you can identify differences between.
Climbing is easy. Statistically some forms of climbing increase your likelyhood of death or serious injury and so you get charged more for them.
Smoking is easy too. So is differential charging depending on your age or sex.
Working out how likely someone is to die of a heart attack in later life is difficult to do except through crude methods or through individual examination. Many companies rate on BMI for example, and most will haul you in for a medical exam if you want high enough cover. Also - most people don't have life insurance in their later years - climbing might make you die in a period when they would have to pay out, whilst a heart attack will occur late on in the cover period or after the cover has ended.
Regarding the OP - BMC medical cover will cover you for 5 grand, as someone has said. Thats not life insurance, thats funeral costs and the cost of getting your body home.
Also, bear in mind that if youve told them you climb only in the UK and you climb abroad then you have technically non-disclosed and if they find out they could in theory reduce your payment even if you die in an accident in the UK.
Sounds unfair, but if they had known you were the type of climber who climbed abroad as well they would have covered you for less payout for the same monthly premium. The question about whether you climb abroad or not isn't just about whether you climb abroad or not, its a question whose answer puts you in a group of people who are more likely to make a claim
wherever it happens to be than the people in the group who tick the climbing in the UK box.
AJM