It probably was sent up to East Mids or Birmingham to cover tech delays etc. An aircraft the extra aircraft is due tomorrow at 14:35. Loosing the a/c cause 45 mins delay to the EDI as it had to operate on the back of the AMS.
I wonder what the back-up plan wil be for BmiBaby if the Polish flights fail again this summer, been looking at the flights for the summer and they are showing quite empty.