Lord Coe has admitted fans will be banned from wearing Pepsi T-shirts at the Olympic park – and could even be turned away for sporting Nike trainers. Speaking on the BBC Radio 4 Today programme, Coe had been trying to end negativity surrounding the build-up. Earlier Boris Johnson called on those worrying about the Olympics to “put a sock in it”, stop complaining and get behind Team GB for the Games. But Coe’s admission, just a week before the games begin, will do little to create a positive feeling around the event. Presenter Evan Davis challenged the Olympics supremo on whether he would be allowed to turn up to an event in a Pepsi T-shirt.