- W1J 7NT - 149 Piccadilly, London. House of the Duke of Wellington
- SW1A 1AA - Buckingham Palace
- HD7 5UZ - covers 7 streets; the most in the UK
- CH5 3QW - the longest addresses in terms of numbers of elements
- SA631QU - the Post Town is CLARBESTON ROAD
- W2 1JB - When all the premises get expanded you'll get the longest 'premise string' in the UK
- PL7 1RF - Devon and Cornwall Police vs Devon and Cornwall Constabulary
- GIR 0AA - special case Postcode for Girobank at Bootle
- GY1 3EW - PO Box
- JE3 1EP - Jersey
- JE2 3XP - Tir na Nog
- IM9 4EB - Great Meadow, Great Meadow
- IM9 4AJ - has no street
- GY7 9YH - French names with commas and apostrophes
- M1 1AA - Shortest manchester postcode
Shared with me my estemeed colleague and fellow Heslop - Gary