There have been "flybe are about to sign..." rumours for the last five years. All nonsense, just like this one. They usually follow a "Jack Walker/Barry Perrot/Jim French was seen in Toulouse yesterday" stories. But were they buying an Airbus, or a couple of cases of decent wine?
Besides, these rumours are usually posted by some pilot on a six-hour "positioning" layover, or a BHX airport standby (in other words, lots of time on their hands and nothing to do, so why not start a juicy rumour).
The wet-lease 737's bound for BHX are being used specifically to evaluate the 737 as the next aircraft for the company, so it seems a little unlikely that they would then order Airbii, n'est pas?
Keep fishing, though...