Sorry this is a bit long winded, I thought it might help someone if they're thinking of flying with their bikes. I recently flew with Ryan Air and Easy Jet and noticed some serious tightening up in the regulations in places. Basically here's what I found out.
RyanAir: Very stressed about weights both in France and the UK. The limit was 15kgs for hold baggage (compared to 20kgs for Easyjet) and they were super strict. I've never been questioned before so don't know if it's recently changed to 15kgs or if I'd just not been bothered before. The bike limit is 20kgs but I didn't get any hassle about being 24kgs on either flight.
Easyjet: The bike limit is 32kgs with a total weight (both bags) of 50kgs. They won't take anything over this. They tried to stop me flying because I had stuff other than my bike in my bag. I was accompanied to oversize baggage and they checked my bag and found I had 2 DH tyres, all the clothes I'd worn that day which were too muddy to go elsewhere and some tools that I'd used to strip my bike. I had a large discussion with a very unpleasant 'lady' at Glasgow who was insistent that my bike shouldn't weigh over 14kgs and she personally checks any bag over that weight. She almost had a heart attack because of the other stuff in my bag and the supervisor was called. I was cracking up because the guy operating excess baggage was making signs behind her back and mouthing rude words! I stuck to my guns, stayed polite and said it was all padding and got away with it. Just.
The second flight with Easyjet from Stanstead was fine, they didn't follow me to oversize baggage or check my bag. I did kill any discussion on weights by saying that I'd already flown easyjet that morning and that I had to leave some stuff at Glasgow to make the weight limit so my bags were spot on the limit.
I've updated the bike packing thing I wrote previously with my new advice. If anyone is interested it's here but it's not conclusive and is based on my experience above, other people might advise differently so it's maybe worth checking with whoever you're going on holiday with. Holiday Bike Packing