Born in Birkenhead, the daughter of Stephen and Sarah Triggs, she was educated at Prenton High School for Girls and at Huntingdonshire Regional College.

Blatch entered politics in 1976 at the age of 39, as an elected councillor to Cambridgeshire County Council.

Blatch was appointed a Commander of the Order of the British Empire (CBE) in the 1983 Birthday Honours.

[1] She was created a life peeress as Baroness Blatch, of Hinchingbrooke in the County of Cambridgeshire on 4 July 1987.

On 7 September 1963, she married John Richard Blatch AFC (a RAF test pilot) and they had four children: David (1965–1979), Hon.