In reply to coldfell:
I always pack mine inside my hold luggage, ( ditto ice axes and crampons).
It's not up to Easyjet, it's airport security who make the decisions and I've found from experience that this can be a bit hit and miss depending on the individual who checks it, and the climate concerning recent acts of terrorism*. It isn't worth the risk of hassle and possible confiscation by security for the sake of a bit of careful packing.
If there is a group of you and you were hoping to restrict yourselves to cabin luggage only, why not club together and share just one hold bag with any doubtful items in it?
*I was unfortunate to fly out on the morning the liquid bombs had been discovered on an overnight flight a few years ago. Talk about over reation and shutting the door after the horse had bolted! Security was the toughest I have ever encountered and they were being over zealous about everything.
Enjoy your trip.