Across changing tastes and formats, Siobhan Redmond has stayed a British actress who has rarely been away from the screen for long. Drama is where the largest part of the work sits. Measured end to end, the working life on screen runs about 42 years. The role of Bumalig Hightopp in 'Alice Through the Looking Glass' is the one that keeps being brought up. 'Mary Shelley's Frankenstein' is the other credit most often cited. Everything here starts from 1984.