BBC - use a proofreader, please

Oh dear, oh dear BBC!

This appeared on our screens on the South East local news programme following the Ten o'clock News on earlier this week:

This error, using "then" rather than "than", is sometimes found of people who do not use English as their first language, and sometimes of youngsters who are not widely experienced in writing.

It is not an error we expect from the BBC.

As we all know, errors can easily creep into our writing, but ... maybe the BBC is too lazy to use a decent proofreader.