- John Hurt
- Self - Narrator
- Joseph Horovitz
- Self - interviewee, Royal College of Music
- Simon Kinder
- Self - interviewee, history teacher, Greshams School
- Sue Phipps
- Self - interviewee, Benjamin Britten's agent
- Raphael Wallfisch
- Self - interviewee, also performer - cellist
- Iain Burnside
- Self - interviewee, also performer - pianist
- Anita Lasker-Wallfisch
- Self - interviewee
- Alex Lawther
- Benjamin Britten
- Mykola Allen
- Oliver Berthoud
- Bradley Hall
- Peter Floud
- Jeremy Lloyd
- David Layton
- Jake Mann
- James Klugmann
- Christopher Theobald
- Donald Maclean
- Paul Hands
- George Hawson
- Alastair Boag
- Walter Greatorex
- Madeleine Brolly
- Matron
- Christopher Scoular
- Bishop of Norwich
- Callum Chapman
- Bernard Floud
- Nick Stromberg
- Roger Simon
- Jack Gillett
- Brian Simon
- John Gillett
- Brian Simon
- William Strong
- Savory
- Oliver Mitchell
- Marshall
- Will West
- First Prefect
- Fergus Franklin
- Second Prefect
- George Anderson
- Third Prefect
- James Gilchrist
- Performer - tenor
- Jake Arditti
- Performer - counter tenor
- Gerard Gollett
- Performer - baritone
- Mark Jones
- Performer - piano
- Benyounes Quartet
- Performers - string quartet
- Oliver Westlake
- Gresham's student
- Fred Searle
- Cadet Company Sergeant Major
