Duncan James has denied reports that he had a sexual relationship with Blue bandmate Lee Ryan.

On Saturday, The Sun carried the front page “Lee: My secret sex with Blue Duncan.”

The paper quoted an anonymous source, who suggested the fact neither singer was married gave validity to the speculation.

“Lee has an incredibly intense relationship with Duncan. He feels he is the only person in the world who truly understands him,” the source said.

“They love each other and it’s true they’ve been intimate over the years. They’re completely comfortable with each other and still go on holidays together.

“Even though they both have children, neither has married and that’s quite telling.”

Responding to the story, James tweeted: “Still laughin at this mornings claims. Every1 knows about the 3somes but it’s never gone beyond that. I mean I love Lee but not THAT much!” (sic).

Lee, who is currently appearing on Celebrity Big Brother, last week revealed he had experimented with men in the past.

“Yeah I’ve been with a man. Everyone’s done experimental s***,” he said.

He went on to say: “I’m a well-travelled person, I’ve never admitted it anywhere. No-one’s bothered to ask.”

The Blue star added: ”I would never be in a relationship with a man though.”