This site belongs to you, Kathryn. That means you can do whatever you like with it (and that includes nothing at all!).
About the domain
kathryn.org.uk is registered in your name, which means (amongst other things) that you can have your own personalised email address: (something) @ kathryn.org.uk (without the spaces). In fact you can have as many email addresses as you like - maybe you can even sell addresses to other Kathryns!
