Sessions moved to Abbey Road Studios in London on 3 October. That day, Wings joined with a supergroup of guest musicians, collectively known as "Rockestra", to record the tracks "Rockestra Theme" and "So Glad to See You Here". A camera crew led by Barry Chattington filmed the proceedings, and a 40-minute documentary, titled "Rockestra", was later compiled from the footage. Equipment used for this session included 60 microphones, a pair of mixing consoles and a 16-track recording desk. James Honeyman-Scott of the Pretenders, Hank Marvin of the Shadows, the Who's Pete Townshend, Pink Floyd's David Gilmour, Led Zeppelin's John Paul Jones and John Bonham, and the Attractions' Bruce Thomas all took part. Also among the line-up was the horn section from Wings' 1975–76 world tour, consisting of Howie Casey, Tony Dorsey, Thaddeus Richard and Steve Howard. Keith Moon was meant to participate, but he had died shortly before the session; Jeff Beck and Eric Clapton were also scheduled to appear.