From remote highlands and islands to the tough city estates of Glasgow, people were equally divided over a vote watched closely by Britain’s allies, investors and restive regions at home and abroad.

Pre-voting opinion polls gave the “No” campaign — those in favour of remaining in the UK — a slight edge. But hundreds of thousands of people still making up their minds held the key as polling stations opened.

Piper Ryan Randall leads a pro- Scottish independence rally in Edinburgh on Thursday. AFP

Tennis star Andy Murray sent a powerful last-minute message in support of the pro-independence “Yes” vote, tweeting “Let’s do this” after months of silence on his views. Many people see the choice as one of “hearts or heads” — whether emotional stirrings and yearnings would outweigh pragmatic concerns over the risks and uncertainty that an independent state would face. “I’ve waited all my life for this,” said Ron, a businessman and the first voter in Edinburgh’s Waverley Court. “It’s time to break with England.” As he spoke, a couple of workers hurrying by shouted “Vote No!”

Those opposed to independence say a split could slow economic growth, affect the UK’s defence capability, threaten the unity of other countries and tip the balance in favour of people who want Britain to leave the European Union. Those in favour see a bright future for an independent Scotland in Europe, a fairer society and good defence and economic cooperation with London.

Leaders of both sides have urged Scots to consider the long-term implications of answering “Yes” or “No”.”

Alex Salmond, the 59-year-old nationalist leader, told his supporters in Perth at a final rally: “Scotland's future must be in Scotland's hands ... This is our opportunity of a lifetime and we must seize it.”

Facing the biggest internal threat to the UK since Ireland broke away nearly a century ago, Britain PM David Cameron could lose his job if Scotland breaks away. — Agencies