"Royal Mail does not normally change postcodes unless there is a pressing operational reason to do so," a spokesman says. ... The Royal Mail's Code of Practice states that postcodes can be altered in "exceptional circumstances" if there is evidence that all those affected are in favour.

How often does a postcode change?

The Royal Mail announces changes to Postcodes approximately every six months and these changes are notified to all customers in the affected areas via their Postcode Update publications. If you would like to receive notification of future Postcode changes then simply register for our free update service.

Do postcode boundaries change?

Postcode boundaries do not align with other geographic boundaries. ... Postcode boundaries are subject to continuous change due to new addresses, single addresses acquiring large user postcodes as mail volume increases, and the need to restrict the number of addresses per unit to less than 100.