Her other television credits include First of the Summer Wine (1988–1989), The House of Eliott (1992) and Lovejoy (1993–1994).
The actress also featured as Martha in the Andrew Davies adaptation of Trollope's classic He Knew He Was Right.
Her many other television credits include roles in Lovejoy, Coronation Street, Juliet Bravo, Last of The Summer Wine, Heartbeat, Holby City, One Foot In The Grave, Seaview, Teachers, Victoria Wood - As Seen On TV, The Hunt For The Yorkshire Ripper, Midsomer Murders and Wire In The Blood.
Her film credits include Britannia Hospital, A Private Function, Pierrepoint and Steven Spielberg's War Horse.
Since 2014, Ollerenshaw has provided the voice of Henrietta (UK/US) in the British animated television series Thomas & Friends.