Although it doesn't show in this scan, this is the self-adhesive 2009 1st class from coils of 10,000. Many direct mail houses used 2nd class stamps on their mail-shots and I've never received a 1st class before, so thank you, Royal Mail!
This is where you can see the code:
And if you get one and don't want it, I'm sure I have customers in the UK and abroad who would welcome it in their collections - please write! (email@example.com). And if you are a collector who has not had one of these - especially our friends outside the UK - please let me know if you would like one. 1st come; 1st served!