Complex sentence: He first entered the British Touring Car Championship in 1996 where he campaigned a former David Lesley RML works 1993 Vauxhall Cavalier with his own low-budget Promotor-Sport Team.
Split into simpler sentences: He first entered the British Touring Car Championship in 1996. He raced a former works 1993 Vauxhall Cavalier with his own low-budget Promotor Sport Team.