Quality Social Media for our Marketing Agency (Must be UK based)

Hello, We're a small marketing agency based here in London. We're looking for someone to bring some real personality and drive to our social media channels on a daily basis. That would be (i) Twitter (ii) Facebook and (iii) LinkedIn. You'll need to be happy creating bespoke imagery and being able to deliver engaging and genuinely interesting posts. Ideally, what we're looking for is someone that is very creative / arty, that understands marketing and is happy to bring ideas to the table about how they think it should be done.
Please only respond if you are UK based. Thanks