BBC's jubilee documentary 'one-sided', says republican pressure group Andrew Lloyd Webber and Gary Barlow will co-write a song for the BBC1 documentary. The BBC has been accused by a leading republican pressure group of planning to make a Gary Barlow documentary marking the Queen's diamond jubilee an "entirely one-sided celebration" of the monarchy. The pressure group Republic said the emails from a researcher working on the programme, in which the Take That star will join forces with the composer Andrew Lloyd Webber to write a special song to celebrate the jubilee, prove that the BBC is "not interested in hearing any dissent around the event" and is merely interested in "promoting the monarchy." BBC1 is to broadcast the documentary, which will feature the search for a song to be performed at the diamond jubilee concert outside Buckingham Palace on 4 June. Barlow will travel the world finding out "what the Queen means to the people of the Commonwealth," according to the BBC, and will also meet Princes Charles and his sons, William and Harry. The singer Bryan Adams is also understood to be contributing and is expected to be working on the backing music for the song. In the leaked emails a researcher for the production company Fulwell 73 said that while the programme-makers would be "happy to expose the fact that Australia would like to be republic, it is only that we are not interested in hearing a personal bad word against the Queen." In the emails - between the researcher and a pro-republican blogger in Australia, and seen by MediaGuardian - the researcher continues: "Of course she herself and everyone around the issue is aware of the fact that not everyone want their Queen as head of State, and this is not a documentary about politics, it is more to celebrate her reign. If you do know any royalists who you have written about, or even someone who is for a republic (but is willing to talk about the Queen herself positively) then we would be very interested in either. Graham Smith, the chief executive of Republic, which has 20,000 online supporters, has seized on the emails as proof of the BBC's wish to promote the monarchy and said it proved that the corporation "should not be making the programme." Smith said the emails proved the BBC was keen to "censor" any anti-monarchy sentiment, adding: "One could argue that a musical celebration of the Queen will obviously not include much negative comment, but the fact that it cannot demonstrates that the BBC should not be making this kind of programme in the first place. The BBC should be reporting on the jubilee - we don't have a problem with that. But these emails prove that they are not being impartial. They are taking part and celebrating it which they shouldn't be doing. Republic has written to Lord Patten, the BBC Trust chairman, complaining about Andrew Marr's documentary series, Diamond Queen. "What was presented as a piece of biographical journalism was in fact pro-monarchy polemic," the group said in the letter. The BBC declined to comment on the specifics of the email. In a statement the corporation said: "In this entertainment programme, Gary Barlow travels across the Commonwealth working with a variety of people specifically to create a celebratory song to mark the Queen's diamond jubilee and to be performed at the diamond jubilee concert. The BBC's commitment to exercise due impartiality across its output as a whole remains.