So, how would he even have this information? Seems a bit far-fetched from a low level private contractor analyst and this could disrupt global affairs as well as hurt our allies.
This is revealed right as a G8 meeting begins, also in the UK, this time in Northern Ireland. His "America spies on China" leak also had suspicious timing around the Sunnylands meeting between Obama and Xi Jinping.
GCHQ intercepted foreign politicians' communications at G20 summits / Exclusive: phones were monitored and fake internet cafes set up to gather information from allies in London in 2009
Like you find out all secrets if you work for an agency, you rummage here, you rummage there, you look in the paper basket for thrown away papers that should not have been thrown away... just like anybody else does it... just some will talk others keep quiet.