Frances de la Tour of Fire" (2005) and "Harry Potter and the Deathly Hallows – Part 1" (2010). Other television roles include Emma Porlock in the Dennis Potter serial "Cold Lazarus" (1996), Headmistress Margaret Baron in BBC sitcom "Big School" and Violet Crosby in the sitcom "Vicious". De la Tour was born in Bovingdon, Hertfordshire, to Moyra (née Fessas) and Charles de la Tour (1909–1982). The name was also spelt De Lautour, and it was in this form that her birth was registered in Hemel Hempstead, Hertfordshire, in the third quarter of 1944. She has French, Greek, and Irish ancestry. She was educated at
Charles Cagniard de la Tour the influence of extreme cold upon its life. Charles Cagniard de la Tour Baron Charles Cagniard de la Tour (31 March 1777 – 5 July 1859) was a French engineer and physicist. Charles Cagniard was born in Paris, and after attending the École Polytechnique became one of the "ingénieurs géographiques". He was made a baron in 1818. He died in Paris. He was the author of numerous inventions, including the "cagniardelle", a blowing machine, which consists essentially of an Archimedean screw set obliquely in a tank of water in such a way that its lower end is completely and its