Complex sentence: Rossendale Transport Limited, as the company is now known began trading on this date and over the last 20 years has expended greatly and now operates buses throughout Rossendale, Bury and Rochdale as well as operating into Burnley, Blackburn, Bolton and Todmorden.
Split into simpler sentences: Rossendale Transport Limited, as the company is now known began trading on this date. It expanded over the following 20 years and now operates buses throughout Rossendale, Bury and Rochdale as well as operating into Burnley, Blackburn, Bolton and Todmorden.