Some of the brands and agencies I have serviced. 
Accenture Interactive (industrial sector, luxury auto)
AKQA
ANNA Money
BBC Worldwide
Channel 5
CNN International Commercial
Crabtree & Evelyn
4 Creative
The Guardian
The Guardian Labs (Beko, Canadian Tourist Board, Clinique, Columbia Sportswear, Disney, Estee Lauder, Gap, Leffe, Marriott, Pirinase, San Miguel...)
Havas Health
Heathrow
​Leagas Delaney
Liberty London
Market Tech Holdings
Publicis Sapient 
​Redwood London (Barclays, Boots, La Redoute, M&S)
Rolls-Royce Motorcars
Salesforce
TMW Unlimited
Vision Express
Vodafone
​Wonderbra
​