Nobody can guarantee a job before you have a CPL or MPL. Flybe give a conditional job offer and it will have more get out clauses than just whether or not the cadets obtain the required license. If you are determined to try and become a Flybe cadet, at least try it at FTE or OAA, where (gasp...never thought you'd read this on Pprune) it's at least £10K cheaper than PTC.