This is one of a mini series.
British Royal Mail Red Post Boxes – a brief history
The roadside post box was introduced in Britain following the 1840 postal reform which provided for universal affordable postage.
The novelist Anthony Trollope, a General Post Office (GPO) official was sent to Jersey to make recommendations.
His scheme began in the Channel Islands in 1852 and was extended to the mainland in 1853. Since these Victorian beginnings, boxes have usually carried the Royal insignia, or cipher, of the monarch reigning at the time of placement.
Although traditionally red, some were painted gold to celebrate the UK gold medal winners from the London 2012 Olympic Games.
The ER VII post box relates to King Edward VII (R standing for Rex (Latin for King) and were put up between 1901-1910.
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This small E VII R post box (having a decorative letter E) is bracket mounted on an old telegraph pole.
Adjacent is a current telegraph pole with two numbers (black on white discs) below the letters DP.
Let these numbers be A & B respectively.
Also there is a small square yellow sign with three words on it.
Let the number of letters in each word be C, D, E
The final cache (a short walk away) is at :-
N 51 08. (C) ((D-C)+E)) (A) E 000 34. (C) (B) (E+A)