Mrs Gobey is puzzled as to why some people living outside the City of Brighton and Hove give their postal address as Brighton.

If she looks at the postcode directory, she will see the correct post town for Portslade, Fishersgate, Poynings and Southwick is Brighton.

This is why a number of the post offices threatened with closure carry a Brighton address.

Furthermore, where the post town is Brighton, no county name is necessary. This has been the situation for as long as I can remember.

It is incorrect to write "Brighton, East Sussex" as, following local government reorganisation in April 1997, Brighton, together with Hove and Portslade, became a separate one-tier county, neither in West or East Sussex.

Mrs Gobey can see the boundary signs as she leaves the city and county of Brighton and Hove via Falmer or Saltdean.

Mrs Gobey refers to "postal numbers" by which I assume she means postcodes.

It is true that, although part of Fishersgate is in West Sussex, for convenience the whole district has been given Portslade, Brighton, BN41 postcodes.

-Peter EH Bailey, Brighton