Rowena Mason writes in The Guardian: The personal financial data of millions of taxpayers could be sold to private firms under laws being drawn up by HM Revenue & Customs in a move branded “dangerous” by tax professionals and “borderline insane” by a senior Conservative MP. Despite fears that it could jeopardise the principle of taxpayer confidentiality, the legislation would allow HMRC to release anonymised tax data to third parties including companies, researchers and public bodies where there is a public benefit. According to HMRC documents, officials are examining “charging options”. The government insists that there will be suitable safeguards on personal data. But the plans, being overseen by the Treasury minister David Gauke, are likely to provoke serious worries among privacy campaigners and MPs in the wake of public concern about the government’s Care.data scheme – a plan to share “anonymised” medical records with third parties.