@markjez73 : If you would like to delete the social menu on the bottom of the page : Login to your WordPress admin section. Go to Appearance => Customize => Menus
It will show you the list of available menus along with the menu locations. Scroll down and click on View All Locations under Menu Locations.
Locate Header Social Menu : Remove the selected menu item from the drop down menu and click on publish.
If you would like to edit the social icons links : Go to Appearance => Customize => Menus
Under Menus you will find the list of available menus. Select the social menu and edit the items as desired and click on publish. Let me know if this helps you out.
Regards,
Tikaram