Construction of the houses and flats for GCHQ staff
proceeded ahead of schedule, and the bulk of the work was completed
by the middle of 1953, some nine months earlier than expected.
New office buildings and the move, 1952-1954
Meanwhile, GCHQ had found it needed more accommodation at both
Oakley and Benhall.
At first it was thought that the original buildings would be adequate,
but new workshops were needed at Benhall and a very large new office
building, providing an extra 100.000 square feet, had to be built
at Oakley. Because the domestic housing was ready sooner than expected
it was the finishing of this building, in 1954, which marked the
completion of the move.