Keyboard Layout Problem.

[stevef]

Just to be 100% clear, the settings layout screen should look something like this.
The mouse pointer in the image is indicating the position of the 'Use Default Settings' on/off slider.
With the pictogram switch set to the left, it is possible to make changes.



If I've understood correctly, you don't see the on/off slider pictogram at all.
Your system operates as if 'Use System Defaults' is set to ON and enforcing the US keyboard layout.

Even with 'Use System Defaults' ON, it should be possible to set the keyboard layout to 'gb' temporarily (for duration of the session) to 'gb' from the CLI.  I think I asked you to check this but please can you run these commands and post back.

Code:

setxkbmap -query

Code:

setxkbmap gb

Code:

setxkbmap -query