A cage fighting gym in London might not immediately come to mind when you think of the UK's financial elite. But it seems white collar workers are developing a taste for combat.

Patrick Vickers works at one of the world's top banks during the day and at night he swaps the boardroom for a grapple on the mats.

He said: "It enables you to have an outside interest, which means your work isn't the main thing in your life."

One in five people regularly practice martial arts in the UK. And now that number is on the rise with a boom in white collar members, according to a recent market study by Combat, Britain's largest martial arts magazine.

Patrick Vickers says it's a good way to bring in the clients.

"The last fight I had, I had a hundred people from work or clients come and watch me," Vickers said. "But, you know, it still is a people business so the more interesting you are, the more likely people want to deal with you."