The fact that the two representatives from the main nationalist party, close to paramilitary separatists, also backed the consensus, suggests that the prime minister's offer of strictly limited law making powers was for them at least a tempting start, if not the clear commitment to full autonomy that they are demanding.

It means that Mr Jospin's initiative, launched six months ago in the face of political stagnation and worsening violence on the island, has a new burst of momentum.

But a backlash is looming over the prime minister's proposals.

Many French politicians, and not just on the right wing opposition, say Mr Jospin's proposals are against the constitution.

Former right-wing Interior Minister, Charles Pasqua, said Mr Jospin was playing with fire.

"He has no idea where he risks ending up."