The crowd belt out "Yma o Hyd" before Wales' victory over Austria in football on Friday. They're led by Welsh writer Dafydd Iwan who wrote the song in the 1980s. The chorus means "We are still here, despite everyone and everything" and the verses trace Wales' history back to Macsen Wledig or Magnus Maximus in Latin, from the time the Romans left Britain in the late fourth century and Wales started to have its own identity as it were, which it has never lost. The song has been taking on the status of almost a second national anthem in recent years. You can see why, as the crowd give it everything. Stirring and inspiring.