Yes, and the same photo is also in Colour of BR Vol 1, a thin paperback publication by Atlantic. However, the caption here does give the date as 4 Jun 1962 and the train is the 5.25 pm Euston-Northampton. It also goes on to say that in Aug 1956 10000 was repainted in Brunswick Green with the new BR emblem at Derby Works. This livery was carried until September 1957 when it was repainted in unlined green.
The lined green version, therefore, lasting only just over a year, which may explain the lack of colour photos.
The notes do not say when 10001 was given lined green, but mention that it had appeared in unlined green by October 1957.
10000 was withdrawn in December 1963, and 10001 in March 1966. (sorry poliss, just realised you already posted this)