AC - almost right, but you got one figure massively wrong. They'll be going onto the 146 for up to 8 months. If it was 18, a lot lot more 400drivers would have walked. The reason they took 10 straight onto the 146 with this deal was because they couldn't release Dash crews for 146 training, because they are short on Dash FO's as it is. What with the time taken to train, it was easier for them to be short on the 146 until the new guys were trained, rather than doing things fairly and being even shorter on the Dash as well....
The £5000 is for the TR on the 146. They are also bonded from the word go for £13000. The reason they introduced the bond is because, as all of us in the queue for the 146 pointed out - who would have paid £5000 for a jet TR, worked over the summer and got a decent amount of jet hrs, and then willingly gone on the Dash..... They would have walked (as any sane person would) leaving those Dash guys, who had been waiting to get on the jet, 8 months down on the increase in salary, 8 months of which they could have ben paying off a jet bond, and 8 months of jet time.