There are a number of ways of accessing information on the website. You can select the tabs at the top of the page which mainly access Club information; you can select the magnifying glass symbol which enables the search mechanism or you can selection one of the eight main topics.
The topics themselves will have sub-topics, external links etc. Remember that information crosses topic borders, so that a subject such as ‘Boundary Trees’ accessed via the Nature topic will almost certainly have some historical data. The best approach in this instance would be to use the search.