According to ABBA star Björn Ulvaeus, 77, his band’s new concert show with digital images of the Swedish pop stars almost ended up in Germany instead of England. Ulvaeus told dpa that there were reasons for the show to take place in London and not in Stockholm. A separate theatre had to be built for the complex technology. Stockholm was too small, Ulvaeus said. So the question was more: London or the Ruhr, he added, referring to Germany’s most densely populated former industrial heartland. ABBA needed a place where the show could stay for a long time, he said. It could have been somewhere in t…