Spencer Silver, Kevin Jackson, Patricia Brown, Asfaw Yemiru

Matthew Bannister on

Dr. Spencer Silver, the American chemist who invented the adhesive used in Post It Notes.

Kevin Jackson, the writer, broadcaster and critic described as a “21st century man of letters”.

Patricia Brown, who played a leading role in cracking German codes at Bletchley Park during the second world war.

Asfaw Yemiru, the former street boy from Ethiopia who founded a school for orphans in Addis Ababa which has given free education to thousands of students.

Producer: Neil George

Interviewed guest: Linda Spencer Interviewed guest: Art Fry Interviewed guest: Tom Sutcliffe Interviewed guest: Iona Brown Interviewed guest: Dr Tessa Dunlop Interviewed guest: Beneberu Demissie Kassa Interviewed guest: Revd Canon Tim Kinahan

Archive clips used: Twenty Minutes_Dutch Icons_Vermeer: Radio 3, TX 8.10.2002; Saturday Review: Radio 4, TX 9.11.2019