LONDON — With the coronavirus outbreak showing no signs of abating, the number of European countries banning public performances continues to rise.Yet despite nearly all of its neighbors introducing bans on public events, the United Kingdom -- one of the world’s largest live music markets -- remained one of the few touring hotspots to resist pressure to suspend concerts and sporting events.Concerts by David Gray at London’s The O2 (March 26), Stereophonics at the Manchester Arena (March 13) and