Liz Truss could face two separate probes over claims she didn't declare thousands of pounds spent on a champagne dinner attended by Tory MPs.
Labour has written to the Cabinet Secretary calling for an investigation into the 'Fizz with Liz' event at a private members' club in Mayfair, London, in October.
It is claimed the event, reportedly paid for by Conservative donor Robin Birley, cost £3,000.