G-GDFA is departing this October. As already mentioned, G-CGET has already left. G-GDFE has recently arrived and will act as a standby aircraft for the royal mail network during the night and passenger services during the day - stationed at NCL from the 2nd Sept.
Glasgow base goes from 1x733 & 1x752 to 2x738 & 1x752. East Midlands will become a mixed 733 & 752 base from 2012. A further 3 738's are due, bringing the total to 5 - MAN x3, GLA x2.
I believe the 2 leased Allegiant 757's will continue to operate next summer, however this is not confirmed. As it stands, the new additions for next summer will be the 3x 738's only. I would expect further new bases to be 738 only and further fleet rationalisation, one base at a time. Over the next 12 months, I'm sure MAN will be a 738/757 base only with 733's leaving the fleet in favour of 738's albeit a handful each year.