By Ali Lyon Ali Lyon sits down with the head of the British Retail Consortium to discuss Brexit, Labour and the changing face of retail A lot has changed since Helen Dickinson took on her role as chief executive of the British Retail Consortium (BRC) in January 2013. Will.i.am and Britney Spears had topped a music chart in an era that was determined just as much by CD sales and Itunes downloads as it was streaming. After two years of post-financial crash gloom, the UK was riding an unfamiliar wave of optimism, having hosted a successful Olympic Games. And, with the UK still in the European Uni…