I take Bob Luckhurst's point about "Brighton City Airport" being in Shoreham, but then "London Airport" is in Gatwick, Stansted, Docklands and Luton, as well as Heathrow.

But what about the city of Brighton and Hove being described as being in East Sussex on vans, letter headings etc.?

Brighton and Hove City is in neither East or West Sussex. It is a unitary authority and should be treated as such and never mind the view of the Post Office.

DA Keates

-Romany Close, Brighton