Conversation so far:
Where did Tony Benn retire from?
He retired from the Parliament and the Cabinet.
When did Tony Benn retire?
He retired from the Parliament in 2001.
what is a signatory?
The writer of a signature is a signatory or signer.
is there anything i should know in the article about Tony Benn?
Benn was a signatory to a letter, that was published in The Guardian newspaper condemning raids of more than 50 brothels in the central London area of Soho.
Why were the women from the brothels arrested after Tony Benn was a signatory to the letter published to the guardian newspaper?
They were arrested in the name of protecting women from trafficking.

Question: anything else?
Self-contained rewrite: Is there anything else about Tony Benn besides his retirement and his signatory to the letter published to the guardian newspaper?