HC Deb 19 January 1943 vol 386 c15
17. Captain Studholme

asked the Secretary of State for War to what extent the War Office is relying upon dowsers for advice on water supply and in what theatres of war; whether this action has been taken with the approval of the Government's scientific advisers; and whether he has any information regarding the reliability of advice given by dowsers during the course of the present war?

Sir J. Grigg

The War Office does not rely on dowsers for advice on water supply in the United Kingdom, and so far as I know the only place where they have been tried is the Middle East. A report of their performance there showed a very small percentage of successes, and orders were issued that scientific geological methods only were to be used.