Conversation so far:
What was one of the new expenses issues?
The Sunday Times revealed that Dorries was facing the first complaint about an MP's expenses claim of the new parliament.
What was the complaint?
The newspaper reported that she had claimed around PS10,000 for an annual report in 2007 on her performance as an MP.
What happened as a result of this?
Dorries insisted that she had indeed published the report, placing a photograph of it on her blog.
Were there any other complaints made?
On 13 January 2011, it was announced by the Daily Mirror that police were investigating Dorries concerning her expenses.
What about her expenses were the police investigating?
In February 2013, it was reported that Dorries was being investigated by the Independent Parliamentary Standards Authority over her expenses, although no specific details were given at this time.
What was the result of that investigation?
On 27 June 2013, Dorries announced she would no longer claim her personal expenses as an MP, but would draw on her salary for such costs.

Question: Who/What is Bercow?
Self-contained rewrite: Who/What is Bercow in relation to Nadine Dorries?