Some exciting post box facts: The blue post box was utilised from 1930-1938 for air mail letters, when such items were not common; and there are over 100 in London alone. The colour blue was rightfully chosen to honour the RAF. This particular blue box is adjacent to the site of the Windsor Post Office,(1887-1966) should you wish to see it, and commemorates the first UK air mail delivery made at this site. Original post boxes were not red, but green.
Liverpool's 'Special' Pillar Box, Albert Dock - This is one of the original 'special' posting boxes that was cast in 1863 by Messrs Cochrane & Co, Dudley. It was introduced to meet the heavy posting requirements in certain parts of the city.