The setting for the story is the "National Computer Centre" or NCC. There was a NCC "National Computer Centre" setup in the UK by the government in 1966 as a non-profit organization with a remit that included the promotion of the adoption of computing.
A good cast highlights an otherwise rather ordinary episode of this Hammer series. Here we get a killer computer, except there wasn't AI back then, just punch cards and other tiresome apparatus. You'd be better off sticking with HAL 9000!