During the 1960s he was featured as pianist, arranger and composer on BBC programmes such as Music in the Air, Melody around the World and Ronnie Barker's Lines From My Grandfather's Forehead.
With Ronnie Barker in Open All Hours, Porridge and The Two Ronnies 1982 Christmas Special playing the barman in the famous drink ordering sketch.
He has appeared on British television many times, with his earliest role being in the LWT comedy series Hark at Barker, in which he plays the driver of a car that crashes when he's distracted by Ronnie Barker carrying a mannequin.
The concept was originally made as an episode of the London Weekend Television/ITV series 6 Dates With Barker in 1971, with Ronnie Barker as Arthur Harris and David Jason as the Odd Job Man (who plays the same role in the feature film).
Ronnie Corbett | Travis Barker | Ronnie Scott | Ronnie Wood | Ronnie O'Sullivan | Ronnie James Dio | Ronnie Barker | Lex Barker | Elinor Barker | Bob Barker | Ronnie Milsap | Mount Barker | Howard Barker | Ronnie Lane | Ronnie Hawkins | Sue Barker | Ronnie Spector | Mount Barker, South Australia | Clive Barker | Ronnie Moore | Ronnie Dyson | Ma Barker | Alfred Barker | William George Barker | Ronnie Scott's Jazz Club | Ronnie Ross | Ronnie Radford | Ronnie Earl | Ronnie Coleman | Ronnie Brunswijk |
Later on, Bregonzi worked with comedians Cannon and Ball, Kenny Everett, Hale and Pace, Little and Large, Kelly Monteith, and on half a dozen occasions in the television series The Two Ronnies (with Ronnie Barker and Ronnie Corbett) and Filthy Rich and Catflap (1987, with Rik Mayall, Adrian Edmondson and Nigel Planer).
His Lordship Entertains was Ronnie Barker's second sitcom vehicle for his Lord Rustless character, first seen three years earlier in Hark at Barker on ITV.
The show was first aired on 24 December 2003, and included guests such as Ronnie Barker, Ronnie Corbett, Jimmy Savile, Noel Edmonds and Tony Blackburn.
He also did the same process in The Ronnie Barker Playhouse, which was the first sitcom anthology series to star the other Ronnie, Ronnie Barker.
: Ronnie Barker and Roy Castle as two Laurel and Hardy impersonators who become their characters as an evening's farcical events escalate around them.
Ronnie Corbett and Ronnie Barker played customers in a public house who keep swearing and are repeatedly told to put coins in a tin by a barmaid.
One of the most famous serials was The Phantom Raspberry Blower of Old London Town (1976), written by Spike Milligan and Ronnie Barker but credited as "Spike Milligan and a Gentleman".
The Two Ronnies Sketchbook was a collection of classic sketches from the BBC comedy series The Two Ronnies, with newly filmed introductions by the stars, Ronnie Barker and Ronnie Corbett.