By STEVEN ERLANGER and ALAN COWELL
EDINBURGH — Voters in Scotland rejected independence from Britain in a referendum that had threatened to break up a 307-year union, according to projections by the BBC and Sky early Friday.
The outcome was a deep disappointment to the vocal, enthusiastic pro-independence movement led by the Scottish first minister, Alex Salmond, who had seen an opportunity to turn a centuries-old nationalist dream into reality, and forced the three main British parties into panicked promises to grant substantial new power to the Scottish Parliament.
The decision spared Prime Minister David Cameron of Britain a shattering defeat that would have raised questions about his ability to continue in office and diminished his nation’s standing in the world.