There have been lots of rumours on this board about MAN; would think this more likely than BOH; BFS is a possibility, possibly even DUB?
As for acft, an all Airbus fleet for bmi/bmibaby makes sense, BUT my feeling is that since they'll be looking for IAE powered aircraft, they may seek to acquire some from a large US carrier, which might decide (or be forced) to relinquish some of the acft it has on order. Frankly, the 318 doesn't seem likely - a little too heavy. 319/320s seem most likely.
Have heard rumours about a sale, but have heard nothing else.