[Osem]

A former Labour pollster has told the BBC that a report into why Labour lost the 2015 election is a "whitewash and a massive missed opportunity".

Deborah Mattinson completed voter research to feed into Dame Margaret Beckett's report, but says her evidence was not published.

Ms Mattinson told BBC Sunday Politics she was "very concerned" that lessons from the election would not be learned.

Labour said the Beckett report had "consulted far and wide".

Ms Mattinson, whose research was conducted in marginal constituencies in places including Croydon, Watford, Nuneaton and Glasgow, insists she had briefed Dame Margaret before the release of her report.

"I was somewhat disappointed not to see some of that reflected back," she said. "Yes, she picked up on the economy, but there actually was no analysis. It's reduced down to one bullet point in the report."

http://www.bbc.co.uk/news/uk-politics-35392319