I agree with all 3 reasons, bmi have set the wheels in motion and pretty much set the MME route to fail over the last few years.
Given the apparant lack of fortsight (surely management knew this was on its way as with GSM) and reluctance to explore other avenues, I suspect LBA will get flyBE to LGW as they already have a presence there and it looks like bmi regional are cutting CPH from LBA too so they will see LBA as more viable.
As for MME, this leaves pretty much eastern airways to LCY but, as mentioned before, this will be unlikely due to high landing fees and I suspect lack of appropriate slots into and out of LCY.
With regards to KLM, I'm sure the marketing dept have already been onto the phone to Holland giving the spin on what a great opportunity this presents but I'm not certain they have spare F100s ready to use just like that?