According to Michael Hall, the following people were also there (in addition to my earlier post):
1964:
Roger Smalley, John Bulley (sp?), Bill Hopkins, Robin Holloway, David Ellis, David Bedford, Edward Cowie, Brian Ferneyhough?.
1965:
Bayan Northcott, Stephen Arnold, William Coates, Brian Ferneyhough.
Filed under: Who was there? , Arnold, Bedford, Bulley, Coates, Cowey, Ellis, Ferneyhough, Holloway, Hopkins, Northcott, Smalley
