TheLiverpool Echo newspaper of 7 December 1949 confirms that Ferrier and Lewis did indeed perform the night before and were not replaced by records in the actual concert hall!
1951 Kathleen Ferrier Festival of Britain Concert flyer Abram Games Nottingham
Kathleen Ferrier, Opera Singer, Edinburgh Festival Programme, 1952
Original 1960s UK Trade Card - British Opera Singer Kathleen Ferrier
1949 Kathleen Long Piano Liverpool Philharmonic Programme Victoria Hall Hanley
1938 Kathleen Markwell Bournemouth Municipal Orchestra Concert Programme Grieg
Ida Haendel, Polish Violinist, Concert Programme, 1949