Hand luggage should weigh no more than 5kg, so doesn't look like. If you get past check in with them you then have your hand luggage scanned and they might deem them dangerous to put up in lockers.
You could wear them
Steve,
I have taken my boots on as hand luggage with Easyjet for the last 5 years. Admittedly don't advertise the fact when checking in. I just say yes I have hand luggage. At worst you can put them on and wear them on the plane !
As Fraser said no weight limit on easyjet, with hand luggage. But they do say that some hand luggage will have to be checked into the hold at your expense if the cabin storage area is full. Check in early!!
I max my hold luggage to 19.99kg. Ski bag 14.99kg and cabin ruck sack to 4.99kg. Now I need to readjust weights due to all this MARMITE I'm packing. I suppose I'll have to leave my hair drier behind