From JOHN DALLMAN
Fascinated by A. J. Hoare’s assertion concerning wartime Royal Signals
standing orders on the value of pi (Letters, 9 November), I did a little
checking. My father was a member of the unit in question (3rd Technical
Training Battalion, Huddersfield) from November 1941 to April 1943, and
denies they ever used 3. 22/7 or 3.1416 for specialised purposes, yes, but
3.0, never!
John Dallman, London
