JWT London is led by a team of three executives and owned by Global president Gustavo Martinez. It has a large creative team and major clients like Rolex, HSBC, Lego, and Nestle. The document then describes a successful advertising campaign JWT London created for Kit Kat at Wimbledon, leveraging the record-setting 2010 tennis match between John Isner and Nicolas Mahut. The ad uses the match score and a beaten tennis ball to connect with tennis fans and promote Kit Kat's "have a break" tagline.