The work of TRE in the invasion of europe

The paper is a composite survey of the work of TRE over a period of three years on radio aids up to the launching of the invasion of Europe. It was written to put on record the way in which ideas and equipments developed so that future Experimental Establishments may benefit from our successes and mistakes. Each Group which was involved has contributed information on its particular work and it is hoped that the picture is complete. The greater part of the paper deals with the use and applications of radio in the reopening of the Battle of France.