Former defence secretary Dr Liam Fox has said that the UK should leave the European Union unless there is a rebalancing of their relationship.
But while he supports a referendum on the relationship, he does not think one should be held now.
"There are those including a growing number of my parliamentary colleagues who call for a simple in or out referendum to be held in Britain soon.
"I too believe that a referendum will be vital. But I believe that having one now would be a huge error with great tactical risks.
"It is not a coincidence that some very convinced euro enthusiasts support such referendum calls confident that a scare campaign based on false fears of political and economical isolation would win the day.
"Instead I would like to see Britain negotiate a new relationship with the EU based on economic rather than political considerations and set out in clear and unambiguous language."
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.