Website banners, social media artwork, Google display banners

I'm looking for a freelance designer for ongoing design support. This would usually be for website banners, social media artwork, google display banners etc. Across various different clients and sectors.

I estimate 3 to 6 hours per month ongoing.

Must be UK-based and have experience in this line of work. We are a small marketing agency and looking for building an ongoing relationship. You would be working directly with me and not client facing.

Please can you provide a few examples of some past designs.