Most of facts are all here.
Careers < Corporate | Flybe UK
The bond used to be £13.5k over three years (that changed on 1st April 2016), reducing from the date of your type rating. It's now £18k over five years, reducing after the first 12 months. And remember it is a bond, so only pay it if you leave the company. I think with Jet2, Thomson, Ryanair, Thomas Cook, Easyjet they all charge for the training whether you stay long term or not.
I don't know if the bond is still enforced if you are already rated, could negotiate that I think.
First proper pay deal in a few years will make it more attractive now. Selection, training and operations staff all very friendly and transparent.
Good company to work for from what I hear, they work hard but your home a lot more than most other operators. Very highly regarded training, safety and SOP standards.
If you want a regional base away from London and to be with your family more then this could be a good option.