The British government plans to offer Scotland more financial autonomy in the coming days as polls predict a very close vote in the upcoming referendum on Scottish independence.

Chancellor George Osborne told BBC Sunday that the government is finalizing plans to give Scotland "much greater" fiscal and tax autonomy and will unveil the proposals in the coming days.

He spoke after polls showed a tightening of the vote ahead of the September 18 referendum on whether Scotland should become independent from Britain.

Osborne said the polls show how important every vote will be and reiterated that an independent Scotland would not be able to use the British pound.

He said Britain's three main political parties understand Scottish voters want more autonomy and that the new proposals would be substantive.