Liam Fox has denied that his speech calling for Britain to renegotiate its relationship with the EU was part of a comeback effort after his resignation last year, and said it would not have been possible for him to make such comments from the front bench.
"I don't imagine I would be giving this speech from the heart of government. At least I would not be at the heart of government for more than about 25 minutes."
Former defence secretary Liam Fox has said that the UK should leave the European Union unless there is a rebalancing of their relationship.
Foreign Secretary Hague said there would be a "very, very powerful" case for a referendum if Europe moved towards a more federal system.