Peter began his education in the entertainment business at the age of five at the Barbara Speak stage school in London.
After this Peter was educated by his father Lonnie Donegan, M.B.E. as well as receiving private tuition on the piano,
Once Peter turned eighteen, he was invited to join the Lonnie Donegan Band, performing as keyboard player with the band and as the opening act before each concert.
Peter spent two years in the band where he was able to learn hands on from the experience of his father Lonnie and during that time he also worked with Van Morrison as part of Lonnie and Van's American west coast tour promoting their album "Skiffle Sessions Live in Belfast" which featured Chris Barber and Dr. John.
After the untimely death of Lonnie during a tour, the family organized, a tribute at the Royal Albert Hall in London, during which, Peter and the Lonnie Donegan Band were featured and provided backing for a kaleidoscope of well known artists, which included, Chas 'n' Dave, Billy Bragg, , Ralf McTell, Barron Nights, Rick Wakeman, Mark Knopfler, Joe Brown, Roger Daltry, Joe Cocker, Van Morrison, Chris Barber, Bruce Welch and Chris Farlow.