https://ukshc.org is the URL for the website. It points to ukshc.github.io through Cloudflare which we use to get https as well as some other advantages.
The website is stored/hosted here on Github.
If you want to edit most content then use Forestry which is a CMS (Content Management System).
If you want to re-do the design/layout/colours etc then you'll have to do that here – probably in /css/main.css
The site uses Bootstrap v4 as a CSS framework to help with layout and design
Edit https://github.com/ukshc/ukshc.github.io/blob/master/_includes/header.html to edit the title of the site (name and year of the convention)
Edit https://github.com/ukshc/ukshc.github.io/blob/master/_includes/navbar.html to edit the Menu at the top of each page