Aware that using the GUI is very beginner esque, but I need to be able to type before I can get to grips with Ubuntu!
keyboard, and then, in the bottom left,
Layout Settings. On the left there is a panel that displays currently installed keyboard layouts. By default, only
English (US) is available. Below the panel, click the
+ icon and select
English (UK). This will add
English (UK) to the panel. Use the
^ symbol to bump
English (UK) above
English (US). The panel is hierarchical, so now
English (UK) takes the priority.
You can even select
English (US) and use the
- to delete the keyboard from the panel.