In reply to MattDTC:
> I assume they are not using fixed heel kit which would be too heavy and restrictive...
> "I'm not sure what you mean by fixed heel kit," Tim says.
> Any binding where you can lock the heel down for the downhills (as oppose to something like a 3 pin binding)
Eh? You lock the heel down on all modern ski touring equipment that isn't telemarking kit. As for weight, my Dynafit ST2 weigh something like 400g, and the only restrictions I face on my ski mountaineering trips have nothing to do with the bindings!
Yours for 200 quid on Sport Conrad.