The story so far:
Extracts from a new book by Observer chief political commentator Andrew Rawnsley, being serialised in the newspaper, claim Downing Street staff were intimidated by abusive outbursts from Gordon Brown;
No 10 says it has looked into the allegations and they are not true;
Lord Mandelson also dismisses the claims, saying the book shows a man "who gets angry but chiefly with himself, who doesn't bully people";
Christine Pratt, chief executive of the National Bullying Helpline, says several people in the prime minister's office had contacted the anti-bullying charity in recent years;
She later clarifies that none of the allegations was about Mr Brown;
Prof Cary Cooper, an expert on workplace stress, resigns as a patron of the charity, saying Mrs Pratt had breached confidentiality.
Sarah Cawood resigns. No, i'd never heard of her before either. Her wikibio explains why: wikibio Sarah Cawood
BBC News - Second bullying helpline patron quits over No 10 row
