Complex sentence: They finished the season third in the First Division (their highest placing since 1968) to qualify for the UEFA Cup, and also reached the FA Cup Final at Wembley, where they lost 1--0 to Southampton.
Split into simpler sentences: They finished the season third in the First Division (their highest placing since 1968) to qualify for the UEFA Cup. They reached the FA Cup Final at Wembley, where they lost 1--0 to Southampton.