Freelance SEO expert in the UK

Hello. I am looking for a UK based SEO expert to help me improve my site's SEO. I have already had some work done to my site, I would like to build on this to increase enquires and traffic to my site. If you have previous experience working on SEO for the wedding industry that would be very helpful. I am looking for a fixed price per month and would like to know what you can realistically achieve over those months. Looking for someone to start within the week.
Many thanks
Katy