<P> In the 2017 CBBC series, Ethel is be portrayed by newcomer Jenny Richardson . </P> <P> Miss Constance Hardbroom is the terrifying and extremely strict form - mistress of Mildred, Maud, Enid, Ethel, and Drusilla . She is tall, thin and bony with waist - length black hair which she keeps "scragged into such a tight knot that her forehead looked quite stretched". Miss Hardbroom favours Ethel Hallow but has the complete opposite attitude to Mildred Hubble . Miss Hardbroom is even terrifying enough to reduce any pupil to a gibbering heap with one word . Despite seeming cruel, Miss Hardbroom's soft side does come through on occasions, such as her "brief flicker of friendliness" at the end of The Worst Witch Saves the Day and her admitting her error of judgement in The Worst Witch to the Rescue . </P> <P> In the 1986 film Miss Hardbroom is portrayed by Diana Rigg . In the 1998 TV series she is portrayed by Kate Duchêne, and in The New Worst Witch by Caroline O'Neill . In the 2017 CBBC series she is called Miss Hecate Hardbroom and played by Raquel Cassidy . </P>

Who plays miss hardbroom in the worst witch