Black Friday: stay out of the red with our smart shopping guide

Research prices in advance on comparison sites and beware deals that come through on social mediaThe tills on the high street did not ring as frequently last Christmas, as consumers opted to buy their presents earlier, on Black Friday, the annual US-inspired event where shops slash prices to boost sales.This year it will take place on 23 November and will be followed three days later by Cyber Monday, another import from across the Atlantic aimed at people spending online. So popular have these d