UPDATED: The series opens with June Brown - here's the Radio Times blurb:
New series. Actress June Brown delves into her family history. She begins in London, exploring one ancestor's role in the shadowy underworld of 19th-century bare-knuckle boxing, before tracing her heritage farther back. The trail leads to Holland and the story of relatives divided by war, and a document that reveals the impact of an expulsion from North Africa at the time of the Spanish Inquisition.
(With thanks to @RadioTimes)