Hut 6

[2] As the number of personnel increased, the section moved to additional buildings around Bletchley Park, but its name was retained, with each new location also being known as 'Hut 6'.

Welchman became official head of section until autumn 1943, subsequently rising to Assistant Director of Mechanisation at Bletchley Park.

For a brief but critical few months from May 1940, the "tip", in conjunction with operating shortcomings or "cillies", were the main techniques used to solve Enigma.

The "tip" was an insight into the habits of the German machine operators allowing Hut 6 to easily deduce part of the daily key.

[3] In 1942, Welchman recruited fellow Marlborough Collegers, Bob Roseveare and Nigel Forward.