[1] In April 1976, before training at the Rose Bruford College, she appeared in GAS with the National Student Drama Festival, which won the Royal Shakespeare Company's inaugural Buzz Goodbody Award and The Festival Judges' Awards.

[2] Dibley came to public attention playing Elaine in ITV's The Two of Us, a sitcom about a co-habiting couple, which also featured Nicholas Lyndhurst.

[3] In 1993, Dibley played the part of Linda in The Gingerbread Girl, a series about a single mother trying to raise her daughter.

However, it was reported that she decided to leave the show because she was uncomfortable with the plans for her character; the script writers proposed Lorna became a prostitute and then be gang raped.

Dibley starred in the BBC drama The Chase, and joined the regular cast of BBC One's daytime soap opera Doctors in August 2010 playing Dr. Elaine Cassidy until September 2012.