It was near 11 o’clock on Saturday night. The O2 had long since flushed its 9,500 patrons out into the dark and the smell of stale beer cloaked its corridors, but the evening’s business was far from over.

Home town hero Conor McGregor crowned UFC's hugely successful return to Dublin with an explosive TKO victory over Brazil's Diego Brandao at the O2 last night.