The only plausible conclusion for your failure to give this assurance is that you were aware that Damian Green, or another Member of Parliament, was the subject of the investigation - conducted not under the Official Secrets Act, but an antiquated common law misconduct offence.
Disclosure could allow competing companies to reverse-engineer fracking fluid formulas, they argued, and Wyoming's open-records law contains an exemption that allows trade secrets to be withheld from the public.
Simon Chesterman, a law professor at the National University of Singapore, notes that Britain's tough Official Secrets Act would also outlaw WikiLeaks' actions.