Being involved in extreme sports is a high risk activity.
It is always a good idea to take the best precautions against the unforseen.
Something you may consider (if you have not already), is getting some personal insurance.
From what I have picked up so far, the British Buggy Club can organise insurance for you at a minimal charge for a year.
See their website for more details
www.britishbuggyclub.co.uk
Another great place to look is Sports Cover Direct
www.sportscoverdirect.com
Their SportsGuard package is highly customisable, and for really good cover at about £120 for a year.
Just type in "Traction" in the quote section for KiteBlading cover.
Have a blast out there.