(Click on image for larger version)
The Robin had, of course, already appeared from Wincor-Nixdorf machines at Trafalgar Square (12th) and Norwich (13th) but this was the first Post Office appearance of the Machin Head and Union Flag stamps with MA13 year codes.
It will be interesting to see when they appear in other locations, given the reporting of everything from Birds 4 to latest issues at Post Offices around the country!
UPDATE 13 DECEMBER:
Frank tells us that the current situation at Tudor Street was:
Tudor Street - Machins, MA13 in machines 1 & 3. Union Flags, no date in machine 2.
A complete waste of time, and in testing each machine with a single stamp purchase - machine 1 did not give a stamp, and machine 3 did not give a receipt and there was nobody there to complain to.