Website structure Seo EXPERT needed

I have a UK website and I think there are two many pages competing for similar key terms, and therefore having a negative impact on site rankings overall, for example some queries have two or three pages ranking on the same page, which is great, however it can also conflict. I think the structure of the site needs to be looked at and a second page of eyes, I'm already knowledgable with Seo, but perhaps someone can spend an hour looking over it all and give their view