English football clubs are moving to bigger stadiums. But can they match the returns generated by US counterparts? Hi-tech innovation may help them Euro 2016, which starts on Friday, will showcase more than just the skills of the continent’s leading footballers. The tournament in France will also highlight the dramatic recent transformation of Europe’s sports stadiums. Of the 10 grounds that will be used, four new ones have been built – in Bordeaux, Lille, Lyon and Nice – and