I answered my wife's mobile Friday last week about 11.30am . I never say the number but as soon as I had accepted the call . A voice that would be good at reading ghost stories announce HMRC , bish bash bosh the phone was disconnected from the caller straight away , a lot of nervous people could have been very upset . I think to be honest the voice put over like that is meant to frighten /scare people, you would never get a phone call from the tax or anyone else with frightening tones like that .