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Snowden leaks 'worst ever'

Edward Snowden's leaks of UK surveillance programmes have been the "most catastrophic loss to British intelligence ever", according to the former head of British listening post GCHQ.

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Guardian editor dismisses Daily Mail leaks criticism

In response to the Daily Mail's story which quotes 'Whitehall insiders' as saying the Guardian's Edward Snowden leaks caused the "greatest damage to western security in history, the newspaper's editor Alan Rusbridger tweeted:

It comes after the Director General of MI5, Andrew Parker said that leaks such as those from former NSA worker Snowden gave terrorists the, "gift they need to evade us."

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