It's effectively part of the British defence establishment. (theguardian.com)
And, now, too, the American defence establishment. (theguardian.com)
The Iraqi stockpile, which contains about 500 tonnes of various chemicals,» is very unsafe and not very well contained», says Barrass, who came to the UN from Britain's Chemical and Biological Defence Establishment at Porton Down. (newscientist.com)