As a performer, Holman released a 1971 self-produced single with two songs, "Act Like a Man" and "Back On My Feet", both co-written with his writing partner Simon May.
Clients he worked for included Carreras Cigarettes, the Scotch Whisky Association, Kellogg's, Optilon Zips, the Arab League, and Chevron.
Holman was booked to play in the musical's band, was at time unable to fly to BBC Scotland in Glasgow to record the theme song to a new BBC1 TV series called Crazy Bus, starring the comedians Hope and Keen, Peter Goodwright, and Ruth Kettlewell.
Two songs from the musical became hits in the UK: "We’ll Find Our Day", sung by Stephanie De Sykes, and "Don’t Let Life Get You Down", by former Four Pennies lead singer Lionel Morton.
Other songs, written by Holman and covered by artists, included "Grin And Bare It" by Barbara Windsor; "Suzie" by Guy Darrell; "Someone Like You" sung by Tails; "Tennis, Cricket Or Gin" by Derek Nimmo; "Thinking Of You This Christmas" by Clive Dunn; "Do What You Wanna Do" by The Pioneers (album track); and "The Dancer" by Bacchus (instrumental).
He also arranged and produced all music included on the Ronco TV-promoted album The Encyclopaedia Of Children's Stories & Nursery Rhymes.
After a short time at West End Centre, Aldershot, Holman became the artistic director of the Athenaeum Theatre in Warminster, bringing artists such as Sir John Mills, Wendy Craig, Lindisfarne, the Chris Barber Jazz Band, Alan Price, and comedians George Melly, Sue Perkins, and Jeremy Hardy.
For seventeen years from 1977, Holman and his second wife, Lynn, created and promoted The Touring Murder Mystery Dinner Actors' Company, that performed a variety of humorous murder mystery plays to over 80,000 people in over a thousand performances whilst they were dining in hotels, restaurants, golf clubs, military wardrooms, and officers' messes throughout the west and southern England, the West Midlands, London, and South Wales, and even during special events cruising up and down the Thames at Windsor.