A committee of the House of Commons summoned a Google executive to give testimony again today and raised the possibility that the corporation might find itself in contempt of parliament.
The Public Accounts Committee is investigating why corporations are not paying enough tax.
Chair of the committee, Labour MP Margaret Hodge, claimed she had documents from whistleblowers that showed Google transacted business in the UK. Google maintains that no money changes hand in the UK.
Under parliamentary procedures, "a person prevaricating or giving false evidence can be considered to be in contempt of the House".
Google's head of sales in northern Europe, Matt Brittin, maintains that the £3 billion in revenues is routed through Dublin, in the Republic of Ireland.
Hodge told Brittin that the committee will continue to investigate until it gets "to the bottom" of the matter.