Mr Flynn said it was alarming that a book by a leading political consultant, Leighton Andrews, was being launched in the National Assembly Building at an event hosted by the Assembly's business manager Andrew Davies AM.

Mr Davies is a former business associate of Mr Andrews and the two men worked closely together in the Yes campaign in the referendum.

Mr Flynn claimed that the hosting of the book launch by Mr Davies is questionable and that the issue should be referred to the Assembly standards committee.

National Assembly Business Manager Andrew Davies

Mr Davies insisted that there was nothing improper about the book launch.

The National Assembly was an entirely appropriate place to launch the book which outlines the history of the Yes for Wales referendum campaign.

Nick Bourne, Conservative AM and chairman of the Assembly Standards Committee, said Paul Flynn had no authority in the matter because he was not a member of the Assembly.