Legendary British actress looks unrecognisable as she transforms for new Channel 4 drama alongside Steve Coogan

TV star Harriet Walter looks a world away from her usual self as she takes on the role of the first female UK Prime Minister in the new biopic series.

Starring on Channel 4 alongside actor and comedian Steve Coogan, Harriet looks every inch the unmistakable Margaret Thatcher.

GettyDame Harriet Walter is taking on the role of Margaret Thatcher in an upcoming Channel 4 series.[/caption] PAChannel 4 has shared a sneak peek of Harriet Walter as Margaret Thatcher in first look images...