Complex sentence: The compilation debuted at No.26 in the UK on Sep.3 2007, this being Starr's highest UK album chart peak since 1974, when Goodnight Vienna debuted and peaked at No.30.
Split into simpler sentences: The compilation debuted at No.26 in the UK album chart on Sep.3 2007. This is Starr's highest UK album chart peak since 1974, when Goodnight Vienna debuted and peaked at No.30.