Playing sports is a great way to meet new people when you move to a new city. Get Active London (http://www.getactivelondon.com/) is the largest and most comprehensive database of sports clubs, facilities and activities in London. They claim to have over 13,000 different sports activities listed on their website.
If you’re not able to find the sport you’re looking for on this site you can look to complete a Google search, check facebook for local sporting clubs or even have a look on Gumtree.
If you’re playing physical sports and feel there is a chance you could injure yourself, you may want to give some consideration to seeking out insurance to protect against this. You don’t won’t to leave yourself unable to earn a wage should find yourself in someway unable to work.