With the abolition of the
Eady levy tax in the early 1980s spelling the end for
low-budget British sex comedies and horror films, McGillivray moved into the theatre, co-writing lowbrow farces for his own company. Working in collaboration with Walter Zerlin Jnr, a series of 10 plays focused on
The Farndale Avenue Housing Estate Townswomens Guild Dramatic Society spoofed local amateur dramatic productions. The plays are published by
Samuel French Ltd and continue to be performed in front of astonished audiences. During this period he also met the performer
Julian Clary, who was then starting as a stand-up comic. McGillivray has continued to this day to write for Clary, but claims that his are the jokes that "don't get laughs". His work has included writing material for Clary when he presented the BBC TV quiz show
Come and Have A Go... in 2005, directing and co-writing Clary's 2009 national UK tour "Lord of the Mince", and directing and co-writing Julian Clary's 2012–14 tour "Position Vacant, Apply Within". As an actor, he appeared with Olegar Fedoro in a new production of the
Russian Futurist opera "Victory Over the Sun" presented by the New Factory of the Eccentric Actor at
Pushkin House, London in December 2008. McGillivray financed and produced
Trouser Bar, the award-winning 2016 British erotic comedy/fantasy film directed by Kristen Bjorn, photographed by Sam Hardy, edited by Esteban Requejo, and intended for a mainstream audience. Focusing on a single "situation" in a menswear boutique in 1976, the short film has been described as an “erotic fantasy" in the style of a 1970s British sex comedy and does not include hardcore scenes. Released in 2017, the film played film festivals around the world. In 2023, McGillivray attended
East London LGBTQ+ Film Festival and was presented with a lifetime achievement award. ==Books==