Enthusiasts during the 1960’s used to get En Route Flight Supplements free from crews at airshows.
As far as I’m aware there were no frequency guides sold to the public until 1979 with the release of the UK VHF Airband Guide by Ken Davies.
Please see this page which is dedicated to the AIRWAVES publication www.airband-radio.co.uk/airwaves
Ken Davies
Lowe Electronics (Chesterfield Road, Matlock, Derbyshire, DE4 5LE)
Waters and Stanton Electronics (18-20 Main Road, Hockley, Essex)
The Aviation Hobby Shop (4 Horton Parade, Horton Road, West Drayton, Middx, UB7 8EA)
Michiel Schaay
EWOL Publications (P.O. Box 88, Matlock, Derbys, DE4 5WF)
DPR Marketing & Sales (The World Of Transport, 37 Heath Road, Twickenham, Middlesex, TW1 4AW)
JAVIATION (Carlton Works, Carlton Street, Bradford, West Yorkshire, BD7 1DA)
In the 1993 edition it stated the last edition was 23rd July 1993
In the 1997 edition it stated the last edition was 8th December 1995
MGT Publishing
Touchdown (Mildenhall Aviation Group)
Air Supply (97 High Street, Yeadon, Leeds, LS19 7TA)
darren@airband-radio.co.uk