Reference has been made to the following publications and organisations :-

Vickers Turbine Transports - LAAS International Publication

February 1974

BAC and Vickers - Lundkvist Aviation Research Inc

December 1980

Vickers Viscount and Vanguard - Air Britain

August 1981

Airliner Production List - Aviation Data Centre

1985

Vickers Aircraft since 1908 - C. F. Andrews & E. B. Morgan

1988

A History of Airlines in Canada - John Blatherwick

1989

Encyclopedia of Airlines in Africa - Ben R. Guttery

1998

British Independent Airlines 1946-1976 - The Aviation Hobby Shop

December 2000

Turbo Prop Airliner Production List - The Aviation Hobby Shop

Various

Vickers Viscount and Vanguard - Malcolm L. Hill

2004

Propliner - The Aviation Hobby Shop

Various

Airlines - The Aviation Hobby Shop

Various

Civil Aviation Authority -Air Registration Board

Air International, Air Pictorial, Airliner World, Flight, Aviation Letter

Various

Airliners  - Bill Mellberg                                                                    Autumn 1993

Highly Recommended Reading :-

i) Pigott, Peter; National Treasure - The History of Trans-Canada Air Lines;
    Harbour Publishing, Madeira Park, B.C., Canada; 2001; pp 401 - 409.
  
   An excellent account of TCA's experience operating the Vanguard, including
   teething troubles and operational idiosyncrasies.

ii) Trubshaw, Brian; Brian Trubshaw - Test Pilot;
    Sutton Publishing, Guildford, U.K.; 1998; Chapt. 8 The Vickers
    Vanguard, pp 47 - 53.
   
   Another excellent account from the horse's mouth outlining the Vanguard's
   passage from test flying to certification.