So, it seems I had two languages/keyboards installed. (English US and English UK)

I removed the English US version and the Input Indicator is now off and remains off after reboot.

Not a...

Ok, so the 'start day of week' issue is now resolved.

The first issue, turning off Input indicator, still remains.

Would appreciate any assistance on this.

Apologies if this is in the wrong section, 1st post!

So, I have turned off 'Input indicator' under 'Turn system icons on or off', I have also adjusted my 'Date and time settings' to show Monday as...