This extract from a 2009 GCHQ presentation includes a report on PRESTON, the agency’s programme for intercepting the communications of individuals or organisations who are subject to surveillance warrants. The report found that, in one six-month period, 97% of such communications had not been viewed by the authorities: see the Intercept article Facing Data Deluge, Secret U.K. Spying Report Warned of Intelligence Failure, 7 June 2016.
This joint GCHQ/MI6 presentation from February 2011 documents the process of international climate change negotiations becoming a “serious intelligence priority” for the UK: see the Dagbladet Information article Snowden documents reveal British climate espionage – Copenhagen climate summit targeted, 1 November 2014.
This GCHQ document from 2009 sets out surveillance priorities from a meeting of the G20’s Finance Ministers, which include the personal surveillance of the then Turkish Finance Minister Mehmet Simsek, who also holds UK and Turkish dual citizenship: see the Intercept article How the NSA Helped Turkey Kill Kurdish Rebels, 31 August 2014.
This briefing from 23 June 2010 describes the NSA’s plans for the G8 and G20 summits in Toronto and the extent of Canadian cooperation. Note that redactions have been made to this document that were not present in a version broadcast on television: see the CBC News article New Snowden docs show U.S. spied during G20 in Toronto, 28 November 2013.