The English cellist, Tatty Theo, studied at the South Hampstead High School (1982-1990). She read music at The Queen's College, Oxford (BA Hons, Music, 1991-1994), continuing her studies at postgraduate level at the Royal College of Music in London with Anthony Pleeth and Jennifer Ward Clarke, where she was awarded her ARCM (PG) and Master of Music degrees (1994-1996). She has won many prizes including first prize in the 1995 Early Music Century competition, and was the recipient of a NOSWAD scholarship to further her studies.
Since 1990, Tatty Theo has performed with many ensembles and at festivals and concert halls throughout Britain and abroad, with live broadcasts on BBC Radio and television, both locally and nationally. She has collaborated with musicians such as Emma Kirkby, Ivor Bolton, Crispian Steel Perkins and Terry Riley, and worked with many of England's period instrument ensembles, including St. James Baroque Players, The Academy of Ancient Music and Florilegium.
In addition to concert performances and lectures on related subjects, Tatty Theo is preparing performing editions of several unpublished works by George Frideric Handel. She is the founder (1995) and director of Brook Street Band. She is also a member of the Kertés String Quartet.
Tatty Theo is the granddaughter of the well-known British cellist and an eminent teacher William Pleeth (1916-1999). On 12 January 2000 the William Pleeth Memorial Concert was held at the St John's Church in London. His son Anthony, granddaughter (cellist), Tatty Theo, and his granddaughter Lucy Theo (violinist) performed, together with two of his pupils, Robert Cohen and Colin Carr.