Complex sentence: The show owed a comic debt to Spike Milligan, but Milligan was disapproving of Mayall, and once wrote: Rik Mayall is putrid--absolutely vile.
Split into simpler sentences: The show owed a comic debt to Spike Milligan, but Milligan was disapproving of Mayall. Milligan once wrote: Rik Mayall is putrid--absolutely vile.