Bishop Sound and Electrical Company
Founded in 1930s by Jack Bishop. Provided sound effects (on acetate discs) and playback equipment to theatre productions until the 1950s.
From 1937, Bishop also recorded performances (for archive purposes, and/or to preserve copyright on performances). A large collection has been digitised by the British Library.
Addresses (dates to be confirmed):
309 Roman Rd, Bow E3
108 Beverley Way, SW20
Comedy Theatre, Panton St, London SW1
48 Monmouth St, London WC2
"Oh How We Laughed: Early Performance Recordings" Article