Priti Patel

Employment minister

As a leading light in the Referendum Party in the late 1990s, Patel might be a natural No supporter. All the signs point to Patel remaining wholly supportive of Cameron

Oliver Letwin

Cabinet office minister

A former adviser to Margaret Thatcher, Letwin is one of the most strongly eurosceptic members of the cabinet. But his loyalty to the prime minister, who has given him a seat on the referendum cabinet committee, means that he will play a helpful role

Philip Hammond

Foreign secretary

A hardline eurosceptic who warned last year that the UK had lit a fire under the EU, Hammond is now a convert

Boris Johnson

Mayor of London and member of political cabinet

With his eyes firmly fixed on the Tory leadership, Johnson is advising the prime minister to be prepared to walk away from EU if talks fail

Liam Fox

Former defence secretary

Officially waiting to see how the negotiations go. But wants to create common market relationship with EU which is not in the table

Ian Duncan Smith

Work and pensions secretary

Delighted with place on referendum cabinet committee but has not ruled out leading No campaign if deal fails to give UK greater control over borders, possibly through emergency brake

Priti Patel

Employment minister

As a leading light in the Referendum Party in the late 1990s, Patel might be a natural No supporter. All the signs point to Patel remaining wholly supportive of Cameron

Oliver Letwin

Cabinet office minister

A former adviser to Margaret Thatcher, Letwin is one of the most strongly eurosceptic members of the cabinet. But his loyalty to the prime minister, who has given him a seat on the referendum cabinet committee, means that he will play a helpful role

Philip Hammond

Foreign secretary

A hardline eurosceptic who warned last year that the UK had lit a fire under the EU, Hammond is now a convert

Boris Johnson

Mayor of London and member of political cabinet

With his eyes firmly fixed on the Tory leadership, Johnson is advising the prime minister to be prepared to walk away from EU if talks fail

Liam Fox

Former defence secretary

Officially waiting to see how the negotiations go. But wants to create common market relationship with EU which is not in the table

Ian Duncan Smith

Work and pensions secretary

Delighted with place on referendum cabinet committee but has not ruled out leading No campaign if deal fails to give UK greater control over borders, possibly through emergency brake

Priti Patel

Employment minister

As a leading light in the Referendum Party in the late 1990s, Patel might be a natural No supporter. All the signs point to Patel remaining wholly supportive of Cameron

Oliver Letwin

Cabinet office minister

A former adviser to Margaret Thatcher, Letwin is one of the most strongly eurosceptic members of the cabinet. But his loyalty to the prime minister, who has given him a seat on the referendum cabinet committee, means that he will play a helpful role.

Philip Hammond

Foreign secretary

A hardline eurosceptic who warned last year that the UK had lit a fire under the EU, Hammond is now a convert

Boris Johnson

Mayor of London and member of political cabinet

With his eyes firmly fixed on the Tory leadership, Johnson is advising the prime minister to be prepared to walk away from EU if talks fail

Liam Fox

Former defence secretary

Officially waiting to see how the negotiations go. But wants to create common market relationship with EU which is not in the table

Ian Duncan Smith

Work and pensions secretary

Delighted with place on referendum cabinet committee but has not ruled out leading No campaign if deal fails to give UK greater control over borders, possibly through emergency brake

Priti Patel

Employment minister

As a leading light in the Referendum Party in the late 1990s, Patel might be a natural No supporter. All the signs point to Patel remaining wholly supportive of Cameron

Oliver Letwin

Cabinet office minister

A former adviser to Margaret Thatcher, Letwin is one of the most strongly eurosceptic members of the cabinet. But his loyalty to the prime minister, who has given him a seat on the referendum cabinet committee, means that he will play a helpful role.

Philip Hammond

Foreign secretary

A hardline eurosceptic who warned last year that the UK had lit a fire under the EU, Hammond is now a convert

Boris Johnson

Mayor of London and member of political cabinet

With his eyes firmly fixed on the Tory leadership, Johnson is advising the prime minister to be prepared to walk away from EU if talks fail

Liam Fox

Former defence secretary

Officially waiting to see how the negotiations go. But wants to create common market relationship with EU which is not in the table

Ian Duncan Smith

Work and pensions secretary

Delighted with place on referendum cabinet committee but has not ruled out leading No campaign if deal fails to give UK greater control over borders, possibly through emergency brake