This is a bit odd - looking at EVALU8 's e-mail, the 'plane' is all the way past the £25k already. My e-mail, it was between the £20k and £25k (the 750 and 1500 were in blue, the 2500 was in grey). I tried to enroll, and was told I was already enrolled.
Not getting my hopes up, but are we sure there will be no back-credit? I'll be interested to see what anyone else saw in their e-mails.