[citation needed] Allen made a cameo appearance in the black comedy Twin Town, directed by his brother Kevin, and the Channel 4 adaptation of A Very British Coup.

[12] In 2001, he played the character of "problem-solver" Jim Napeworth in an episode of Murder in Mind, and in 2004 cameoed in Black Books as poker-player Dave 'Mouse Ears' Smith.

[citation needed] Allen cameoed in the Channel 4 sitcom Spaced in a short homage to the Stanley Kubrick film, The Shining.

[citation needed] He appeared in the hospital drama, Bodies, as Mr Tony Whitman, a sarcastic but somehow likeable consultant obstetrician with an enormous ego.

[citation needed] In 2005 he appeared in the Endemol-produced BBC Two television programme Art School alongside Ulrika Jonsson, John Humphrys, and Clarissa Dickson Wright where he discovered a passion for painting.

[citation needed] Allen has also starred in pantomimes, such as an adaptation of Robert Louis Stevenson's Treasure Island in 2008, written by Ken Ludwig and directed by Sean Holmes; he took the role of a gritty Long John Silver in the Theatre Royal Haymarket.

[citation needed] 2012 (2013 in the UK) saw the release of the Sara Sugarman comedy film Vinyl in which Keith played an ageing rock star who finds himself back in the public eye after his band member fools the music industry into giving them a record deal.

[citation needed] In April 2013, Allen starred in a revival of Richard Bean's black comedy Smack Family Robinson at The Rose Theatre, Kingston upon Thames.

[citation needed] In January 2021, Allen played serial killer and rapist John Cooper in the ITV 3-part drama, The Pembrokeshire Murders.

The show contained what turned out to be Floyd's final interview for television, as he died of a heart attack on the evening the documentary was screened.

He co-wrote their only UK number one single, "World in Motion", and occasionally performed with them live, including their headline show at the Reading Festival in 1998.

[citation needed] He has been involved in several other football-related records, including "England's Irie" by Black Grape and wrote the lyrics for "Vindaloo" by Fat Les.

He also contributed the song "On Me Head, Son" to the film Mike Bassett: England Manager, credited on the soundtrack album to Sporting Les.

[31] In the mid-1980s Allen served a 21-day jail sentence in Pentonville Prison after being found guilty of criminal damage at the Zanzibar club in Covent Garden.

[34][35] Allen has on his shoulder a tattoo of Rinka the dog, owned by Norman Scott, which was shot dead during the Jeremy Thorpe scandal.