So I have looked this up and can only find solutions for older versions of Gnome.
Everywhere quotes this as the solution:
xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search gsettings set org.gnome.desktop.background show-desktop-icons false gsettings set org.nemo.desktop show-desktop-icons true
Which worked on on older versions of Gnome (such as the version available with Ubuntu 16.04LTS) but so far nothing is working on the most recent. I would like to replace Nautilus with Nemo, allowing Nemo to produce desktop icons (home folder and rubbish bin) as well as being able to drag my cursor along the desktop to highlight things.
My current Ubuntu version is 17.10 Gnome 3.26.1 Nemo 3.4.7 Nautilus 3.26.0
I have had no luck on both Wayland and Xorg.
Thanks in advance to any comments and solutions.