Diane Lloyd is a fictional character from the BBC medical drama Holby City, played by actress Patricia Potter. She first appeared in the series four episode "High Risk", broadcast on 2 July 2002. Diane arrives at the hospital to work as a surgical registrar. She is characterised as an "ambitious" female determined to succeed in a "male-dominated world". She is portrayed as unlucky-in-love and has numerous failed relationships during her time on the show.