Digital Marketing for on-line business

We are a fast growth on-line business based in Manchester, looking for someone to work for us on a freelance basis to give our digital marketing a much needed boost in terms of both scope and performance. We have well established and strong performing campaigns across a number of areas including PPC, SEO, Affiliates etc and require someone to take on the management of these and give them a much needed boost in terms of scope and profitability. There are specific weekly tasks that need completing such as e-mail marketing, affiliate campaign management, SEO/PPC liaison/management, reporting as well occasional tasks such as copy writing and press releases. The work we require is all about evolving and growing our current campaigns in the above areas, as well as exploring new areas that we could exploit to grow our on-line digital marketing presence. We are looking to appoint someone(s) ASAP, and there is potential for this to be a long term relationship should the freelancer prove their ability to generate a strong ROI.