"The Broadcast" were overdubbed in the kitchen and performed by the owners of Lympne Castle, Harold and Dierdre Margary. October–December 1978: Abbey Road Studios 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. On 10 October, Wings taped "Getting Closer" at Abbey Road, along with a demo of "Baby's Request". McCartney had intended this recording of "Baby's Request" for the Mills Brothers to use as a guide, but after they asked to be paid for recording the song, he instead included the demo on Back to the Egg. The band then continued with overdubs on these and other songs intermittently through October and November, finishing at Abbey Road on 1 December. December 1978–February 1979: Replica Studio Towards the end of the year, Wings also carried out overdubs at the newly built Replica Studio, located at MPL's Soho Square offices. Frustrated at the impending unavailability of Abbey Road's Studio Two – which studio owner and record company EMI needed for its other acts, besides Wings – McCartney had constructed an exact replica of Studio Two in the basement at MPL. Among the work done on Back to the Egg at Replica, the band replaced the final twenty seconds of "So Glad to See You Here" with what Madinger and Easter describe as "a reggae-styled coda", containing the "We're Open Tonight" reprise. Sessions continued there in January and February 1979. During that time, the band recorded a non-album single – the disco-styled "Goodnight Tonight", backed with "Daytime Nighttime Suffering" – as