A reminder, then, that the reason you - and I - are missing it from our collections is that only FIVE copies are known, all used.
This is how we reported it back in July. Apart from the few more that have been found after this one, as far as we know, nobody has any mint examples. We'd love to be able to supply them to you, mint or used, at any price. I've handled one of the used copies, but even that isn't mine.
Richard P has kindly sent this image of a 2010 2nd class self-adhesive coil MA10 MRIL on a direct mailshot.
This is a new find and suggests that the 1st class might also be out there. We have reason to believe, from information supplied by Royal Mail, that the 2011 versions also exist. However, we have no way of knowing whether the part of Royal Mail which supplies these to the mailing houses has yet sold, or even received, any of the 2011 versions - which have been produced for both 1st and 2nd class values.