The Channel 4 drama The Devil’s Whore, set to to be broadcast in November, was filmed in countryside in South Africa because it was cheaper, organisers said.
The four-part serial tells the story of the Civil War through the eyes of Angelica Fanshawe, an aristocrat drawn to the anti-monarchist cause.
The story includes the well-known Battle of Naseby, which happened in the Northamptonshire countryside on June 14 1645.
Head of Channel 4 drama Liza Marshall defended the decision not to film the scenes in England.
She said: “It’s much more affordable to film there and we found a region where the countryside just looked similar to England.”