£6 said,
"Believe me, if it suits the current plan they will grant early bids sometimes well within the initial 5 years"
This is what I meant in that they will be short on experience on the larger aircraft in a few years and will need to move people from SH to LH. I know they can direct you within the time of the engagement freeze but as always if there are pilots who wish to move then they get the chance first.