Last week, sources said Hutchison declined to offer fresh concessions.

That prompted the EU antitrust authority to demand fresh concessions from the U.S. company.

He said fresh concessions would only lead to fresh demands from automakers for sacrifices from workers.

Ryanair has offered fresh concessions to European Union antitrust regulators reviewing its €694 million bid for Aer Lingus.

However, key UK overseas territories, including the British Virgin Islands, are resisting Cameron's calls to make fresh concessions on ending tax secrecy at the summit.