Ryanair are very hot about excess baggage at the moment ......... even a part kilo will be charged for. Recently I have found plenty of other travellers doing what I do - find an unused check in desk and weigh and rearrange luggage before approaching the Ryanair check in desk ............ and when you have to show your boarding card at security landside, there's NO WAY that the security attendants will let more than one piece of handluggage go by them ..... I often take a huge shopping bag and put all my bits in that so that I can get by this 1 piece ruling!
Easyjet are far more generous - 20 kg hold and one piece of any weight hand baggage ... assuming you can lift it yourself and put it in the overhead bins.