Speed of reaction to social media trends is becoming more important in the battle between fast fashion and more established High Street retailers, say experts. [...] Topshop's global marketing director Sheena Sauvaire told the BBC's Today programme that while the concoctions on the catwalk influence High Street retail design, social media is increasingly playing a role.

For the last day of her state visit to the UK,  which included an official farewell to The Queen and Prince Phillip at Buckingham Palace followed by a tour of the Francis Crick Institute, Letizia wore an ivory prom-style skirt by one of the UK's best-loved high street labels, Topshop. [...] Diplomatic dressing is a favored sartorial tactic of many of the world's most high-profile women, who use their style choices to pay tribute to the places and countries they visit.