Chorley Cemetery records have recently been transcribed by the local branch of the LFH&HS. I understand that if you go direct to the cemetery, they are supposed to charge a fee for records, though when I called at the office there they happily printed the details of my family's plot.
With a date so late, cremation is also quite possible. The two places most likely are Overdale at Bolton and Pleasington at Blackburn. Carleton at Blackpool is also possible.