Complex sentence: Prior to this orthodox career move O'Regan had witnessed The Beatles at the Hammersmith Odeon in 1964 with his Mother Marie, and in the early Seventies he smuggled a camera into the same venue to photograph Paul McCartney and Queen.
Split into simpler sentences: Prior to this orthodox career move O'Regan had witnessed The Beatles at the Hammersmith Odeon in 1964 with his mother, Marie. In the early Seventies he smuggled a camera into the same venue to photograph Paul McCartney and Queen.