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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Thousands of elephant tusks and rhino horns has been burned in Kenya, in a warning to poachers and smugglers.
The death toll following the collapse of a six-storey building in Kenya rises to 10 as fears grow for those still trapped in the rubble.
Springwatch presenter Chris Packham describes his battle with depression as "great, hopeless vacuum".