Sir Denis O'Connor, outgoing HM Chief Inspector of Constabulary, will give evidence on Olympics security.
Stephen Greenhalgh, Deputy Mayor of London for Policing and Crime, will give evidence on policing in London.
Metropolitan Police Commissioner Bernard Hogan-Howe has also been asked to give oral evidence.
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Top management at British Gymnastics face a grass roots rebellion in the wake of recent controversies surrounding the sport.
Philip Hammond's financial commitment to the NHS in this year's Budget falls short of what is needed according to hospital bosses.
As well as preparing his speech the Chancellor had spent some time preparing his gags, one of which included a prop.