Complex sentence: In United Kingdom, the movie was never submitted for certification to the BBFC, although the sequel was denied a BBFC certificate in 1987 after the distributors refused to make the cuts required for an'18' certificate.
Split into simpler sentences: In United Kingdom, the movie was never submitted for certification to the BBFC. Its sequel was denied a BBFC certificate in 1987 after the distributors refused to make the cuts required for an'18' certificate.