Conversation so far:
what does b mean on a number plate
In Great Britain, the local memory tag B on vehicle registration plates stands for Birmingham.
where is birmingham uk on a map
what is the demonym for people from birmingham uk
People from Birmingham are called Brummies.
why are people from birmingham uk called brummies
People from Birmingham are called Brummies, a term derived from Birmingham's nickname of Brum, which originates from Birmingham's old name, Brummagem, which is thought to have derived from Bromwich-ham.

Question: how old is the city
Self-contained rewrite: how old is birmingham uk