The song Gary Barlow and Andrew Lloyd Webber have co-created for the Queen's Diamond Jubilee celebrations is to get its first airing on BBC Radio 2 later. Sing features musicians from across the Commonwealth, the Military Wives choir - and Prince Harry on tambourine. The Prince made his contribution - his recording debut - in Jamaica, one of four Commonwealth countries that Barlow visited while compiling the song. Sing will have its first play on Chris Evans' Breakfast Show on Friday. The video for the track, credited to Gary Barlow and The Commonwealth Band, will be fully unveiled on The One Show on BBC One on Friday evening.