1940:
Wardle Engineering Co Ltd
Wardle Worklite Reflector Lighting - Metal Spinning
Rec. Num. 1 of 2
Source: Aeroplane April 12th 1940
1940:
Wardle Engineering Co Ltd
Wardle Prismalux Lighting For Corridors, Shelters & Stairways
Rec. Num. 2 of 2
Source: Aeroplane May 10th 1940