In reply to The Ex-Engineer:" I've used petzl lynx" - and you're right I have actually got a pair.
I was advised however that for general hillwalking these were not the best/right crampons (as I assume that they are for actual ice climbing (which was what I got them for).
I'm not really that well versed in winter gear (apart now from ice climbing which I did for the first time in France this year - and that was the first time I have ever used crampons)