A source close to the actor told People magazine: "When he's in London he's going to be seeing his friends. [But] there is no mystery woman."

The 50-year-old star is said to have made a number of new friends in the city and enjoys letting his hair down after long hours working on the set of his new sci-fi thriller ‘All You Need Is Kill’.

The actor was spotted partying until 3 a.m. at Annabel's nightclub earlier this month, where he reportedly chatted up several fellow-club goers.

The source said: "Tom loves the people here [in England]. They're friendly."

But three months after his third divorce, Tom – who has most recently been linked to actress Cameron Diaz - is apparently not ready to move on with a new girlfriend just yet.

The father-of-three is said to be focusing on his career and children, particularly his youngest daughter Suri, who lives in New York City with Katie.

Tom's attorney Bert Fields recently claimed the 'Top Gun' actor was so keen to be informed about Suri's upbringing he was calling her as often as twice a day.

He said: "Tom has been in England shooting a film. He calls Suri every day, sometimes twice a day.

"He loves Suri and is a constant presence in her life.  As in the past, when he's shooting in a foreign country, he has to rely on daily phone calls."