Barack Obama knows how to enjoy life, according to graphologist Allan Conway, 70, He has analaysed the president’s handwriting and says the study also reveals that the President, in town for the G20 summit (in case you hadn’t noticed), is a charming man, more controlled by his head that his heart. He can be quite sensuous, mind.

Mr Conway, who has been studying handwriting for more than 30 years, tells People: “Obama takes everything apart and analyses all the components, seeking to understand how everything works. He lives in the present. He would waste little time on useless activity. He is tougher than people think. He takes great care in what he’s doing.”

Mr Conway has also recently analysed the writing of Foreign Secretary David Miliband; Nick Clegg, the leader of the Liberal Democrats; and the Lib Dem Treasury spokesman Vince Cable. “Vince Cable is a very capable man,” says Mr Conway, who is often employed by couples to check marriage compatibility, companies seeking an evaluation of a potential employee and by firms and agencies looking to detect forgeries. He is also a regular university lecturer and ITV has expressed an interest in creating a television programme on his work. Having published three books, including A Book of Revelations; Secrets of Mind and Body as Revealed through Handwriting, he is now working on his next publication, They Made It Big — so could you.

In it, he will pick out the common characteristics of some of the world’s most successful entrepreneurs, such as easyJet founder Sir Stelios Haji-Ioannou and former US president Bill Clinton, who Mr Conway describes as “one of the most charismatic people” he has ever met. “People don’t make it big by accident. They all have passion.”

Mr Conway, who has no plans to retire, lives in Stanmore, Middlesex.