The UK tax authority HMRC abused the country's controversial anti-terrorism law to spy on a whistleblower and journalists at the Guardian after it was embarrassed by the revelation that it had given a sweetheart deal to Goldman Sachs. Osita Mba revealed a government oversight body that HMRC forgave GBP10M in interest owed by Goldman Sachs after a failed tax-evasion scheme, and in the ensuing public furore, HMRC's top executives invoked RIPA, the country's anti-terror law, to spy on its employees and on Guardian journalists in order to discover the identity of the leaker. Under RIPA, HMRC is able to spy on the nation's emails, Internet traffic, text messages, phone records and other sensitive data.

Lin Homer, the head of HMRC has appeared before a Parliamentary committee to explain its use of anti-terror spying powers to uncover the identity of a whistleblower whose personal information is protected by legislation, and was unrepentant, and would not rule out doing it again in the future.

Margaret Hodge, the committee chair, expressed shock at this. But it was under her party's last government, the Blair regime, that RIPA was put into place, over howls of protest from campaigners who predicted that it would be used in just this way.

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