IN THE wartime drama Foyle's War, the 25-year-old played a scientist developing biological weapons. In Torchwood, he was cast as Tim, a WWII airman, and in The Letter, which tours to The King's next week, he plays a district officer called into investigate a suspicious death.
Yes, when directors are looking for the quintessential young upper-class English gentleman, it appears they look no further than Darlington-born Sandys-Clarke.
"All three are rather typical of the parts I get. I don't know why," he says, "and they all tend to be in pieces set between the 1930s and 40s. But if the parts are there, I'm very happy to play them."
Sandys-Clarke made his TV debut in Foyle's War having studied drama at Birmingham University. "I'd enjoyed taking part in school plays and then I did drama at university. By the end of my time there it was the only thing I could see myself doing," he says.
Last year he found himself cast in the BBC's Doctor Who spin-off, Torchwood, with John Barrowman as Captain Jack Harkness.
"It was a great show to work on because everyone was so involved and committed to it which meant there was a great atmosphere on the set. It was in the penultimate episode which revolved around Torchwood's Captain Jack meeting the person whose identity he stole. I was one of the RAF officers in the real Captain Jack's squadron. All my scenes were set in a dance hall - thankfully I didn't have to dance - where all of the young pilots were at an end of training dance before going off to war."
At the King's, Sandys-Clarke will play John Withers in Somerset Maugham's classic tale: When the wife of a Malaysian rubber planter is witnessed murdering a local playboy, she claims it was in self-defence. Convinced of her innocence, her husband hires a family friend to defend her. However, then a mysterious letter comes to light.
"My character is the local district officer who is summoned to investigate the death," explains the actor, who admits that appearing alongside Jenny Seagrove, best known as Jo Mills in Judge John Deed, and Anthony Andrews, is a thrilling experience.
He says: "It's my first tour and I'm really enjoying it because we are a very close company and we all get on, which is important when you're living in each others pockets. It's terrific to work with Jenny Seagrove and Anthony Andrews. You learn a great deal from people with that much experience."
Spoken like an officer and a gentleman.
• The Letter, King's Theatre, Leven Street, Monday-Saturday, 7.30pm (matinees 2.30pm), 10-21, 0131-529 6005