Complex sentence: Despite disagreements over shirt sponsorship in the early 1970s, Rugby League remained a mainstay of BBC Television during the 1970s and 1980s, although the commitment to the Floodlit Trophy decreased before financial cutbacks at the BBC lead to its cancellation after the 1979-80 competition.
Split into simpler sentences: Despite disagreements over shirt sponsorship in the early 1970s, Rugby League remained a mainstay of BBC Television during the 1970s and 1980s. Although the commitment to the Floodlit Trophy decreased before financial cutbacks at the BBC lead to its cancellation after the 1979-80 competition.