The fact it is created on an open cast site that once employed hundreds of miners before it finally closed a decade ago is not lost on him.

BBC: Racecourse under starter's orders

The 1, 000-acre site has lain derelict since open-cast mining ended.

BBC: Recycling plan dumped

The veil of secrecy that was cast over Bletchley led not just to the decay of the site but also meant an opportunity was lost for Britain's computer industry, Meacham believes.

BBC: Why is Google in love with Bletchley Park?