Hertfordshire’s Last Police Box was at the junction of Holmshill Lane and the A1 at latitude: 51.672731, longitude: -0.238824.
Box No: S63
District: South Mimms
Metropolitan Police type designed around 1929 by Gilbert Mackenzie Trench, O.B.E., F.R.I.B.A., F.S.I., Architect and Surveyor to the Metropolitan Police.
This area was originally controlled by the Metropolitan Police but in the Greater London Authority Act 1999 the boundaries of the Metropolitan Police District were redefined to match Greater London. The excised county areas, including Hertfordshire Constabulary were reassigned.
The Mix map above shows a 1970 map and 2019 map overlayed to show the position of the box, which would have been below the 90 degree bend in the stairs.