John Coyle was a well-known City PR man and former journalist. He died in 2006.
- together they built Broad Street into a pounds 15 million public company with a reputation for high-profile and aggressive PR, together with an equally high-octane lifestyle. 
Another account after his death summed up his 'colourful' life and career:
- Johnny was a colossus who bestrode City PR in the 1980s. He built Broad Street Associates with Brian Basham and between them brought a new meaning to the contested takeover bids of that boom era. Johnny started half-a-dozen other PR companies, married and divorced many times, made two fortunes and lost them both, was declared bankrupt and probably made as many enemies as he did friends.
- Barbican Corporate Communications - formed in August 1994 in partnership with John Emerson, a one- time director of Saatchi & Saatchi Advertising 
- Square Mile Communications -formed after he left Broad Street Associates in 1988
- Steve Bevan, Profile: Brian Basham, Warwick Corporate: PR man who’s up for a fight - Brian Basham faces 1997 with expansion, instead of libel suits, on his mind, PR Week, 10 January 1997, acc 27 January 2012
- Coyle a tough player in corporate world, Profile Extra, CIPR web journal Publication Date : 30 June 2006
- Dominic Prince, Bunhill John Coyle] The Independent, 28 August 2004