David Beckham pictured here at his book signing event held at the Piccadilly branch of Waterstones in West London on December 19th 2013. He attended the event in a pair of Saint Laurent 16CM Skinny Dirty Used Wash Black Jeans with Saint Laurent Suede Chelsea Boots in chocolate. It seems as though he's wearing a lot of Saint Laurent at the moment, probably due to the fashion house bringing Hedi Slimane back.
A Little Bit About Hedi Slimane
You can purchase the jeans from: Luisaviaroma
You can purchase the Saint Laurent Suede Chelsea Boots from: Lyst
I wish I knew where the jumper was from, but I don't. If anyone out there knows, please do share...