E16 Victoria Docks and North Woolwich: why this London postcode has the number 16

After Stratford, before Walthamstow

Victoria Docks and North Woolwich is E16 because of the alphabet. E1 is the Eastern district office, and in the Post Office's list of March 1917 the offices after it follow by name: Victoria Docks and North Woolwich comes after Stratford (E15) and before Walthamstow (E17).

See E16 on the map