Channel 4 boss apologises over failure in investigation of Russell Brand claim

Alex Mahon says former staff member made serious' allegation in 2009 that was not investigated as it should have been'

The head of Channel 4 has apologised to a former staff member for not properly investigating a serious" allegation made against Russell Brand in 2009.

However, the broadcaster found no evidence" that staff at Channel 4 knew about the accusations made by four women in a Dispatches documentary before it was aired in September.