Mr Mangione was employed as a data engineer for TrueCar, a digital retailing website for new and used cars, according to his social media profiles.

Just in: The retailing giant raised its sales outlook for the year, after a strong quarter fueled by surging e-commerce activity and robust demand from higher-income consumers.

"Successful retailing is all based on feedback from the customer. It's about understanding your customer," he added.

Andrew Hinds, chairman of jewellery retailers F Hinds, also found a "mixed picture" across retailing.

Hirschorn: And also the retailing of extremely young people as pop stars and performers.