Jonathan Cake talks about being reunited with an old flame for his latest drama, The Swap

Not because he has to get under the skin of a sinister baddie who plays warped mind games, in ITV1’s two-part psychological thriller The Swap, but because it teams him with his former girlfriend, Jemma Redgrave.

The two played lovers in Mosley in 1998 and romance spilled over into real life. After filming ended, Jemma split from her husband, Jonathan broke off his engagement to actress Olivia Williams, and they later became an item. Although the relationship didn’t last – Jemma was reunited with her barrister husband Tim Owen after 18 months apart – there was an undeniable chemistry between the pair, who are still on good terms.

“There was a spark between us,” says Jonathan, 34. “But that spark was a professional one. It was great to be working with a woman I like and admire. Whatever happened between us in our private lives was done and sorted long ago.

“Working so closely with Jemma again made me realise how good she is as an actress. It was very rewarding and challenging because it made me feel as if I should raise my game.”

Neither were prepared for the glare of public interest in their private lives almost four years ago, and Jonathan is bracing himself for another onslaught now that they are co-starring in The Swap.

You can read the rest of the interview here.