Bletchley Park
One of the reasons for choosing Bletchley Park for this task was its location. By train, it is about  north-west of London,  from Oxford and about  from Cambridge all-important university cities. Bletchley railway station is close-by, on the junction of the West Coast Main Line and the Oxford–Cambridge Varsity Line. Apart from the railway lines, Bletchley Park was not near any other likely bombing target.