An amazing pair of Coxes

The entertainers' union Equity insists that no actors share the same stage name, writes Peter Rhodes.

This explains why someone born David Williams is better known as David Walliams.

But there are two celebrities with the name Brian Cox.

One is the rugged Scottish actor, the other the floppy-haired scientist who presents programmes about stars and says "amazing" rather a lot.

Doesn't there come a stage when a television scientist becomes an entertainer?