Crusin Level - there is the odd example of someone who fails BA's training and goes to work for another airline only to end up back at BA a few years later. Thats just the nature of the beast. Anyway, its easy to fail someone on a check - we all have our breaking point!
As far as failing the selection is concerned, I have met a couple of interviewers/ selectors with very big anti-DEP, anti-RAF, anti-anything but Hamble chips on their shoulders. As with any company there are some people that should have been hired and a few odd-balls that slip through the net.
With regards to the bidding, etc... of the ex-CFE pilots is concerned, I just wish that people would put their money where their mouth is. Why not just bid for 737s at LGW or follow the RJ? Many of us remember Andy Walker's anti-BA tirade in the BALPA news letter. He even went as far as to slag off our staff canteens, yet right now he's probably enjoying the fine cuisine rather than eating at Harry's keebab van around the corner. And he probably bid for Concorde!