London-based delivery service ParcelHero said that it’s forecasting an £8.49bn (€9.5bn-$11.5bn) monster Black Friday to Cyber Monday weekend. It warns that stores must learn from the disaster of Black Friday 2014 or delivery chains could snap once again this year. In 2019, Britons spent a £5.55bn (€6.2bn-$7.4bn) on Black Friday-Cyber ...