The UK's consumer watchdog Which? said Black Friday has become a "hype-driven sales extravaganza" that in the case of some retailers goes on for longer than two weeks. Getty Images
The UK's consumer watchdog Which? said Black Friday has become a "hype-driven sales extravaganza" that in the case of some retailers goes on for longer than two weeks. Getty Images

Black Friday, grey areas: Why it pays to read the small print on Britain's big bargain day