Windows changed my UK keyboard to US -- how get the UK one back?

Hello,

Windows 10 has a default system-wide language, but you don't have to be stuck with a specific language if your needs are different. Follow these steps to change the system and keyboard language:

Change the system language

1. Open Settings.
2. Open Time & language.
3. Select Region & language.
4. Add your preferred language, and set it as default.

Change the keyboard language

1. Open Settings.
2. Open Time & language.
3. Select Region & language.
4. Click on the default language, and select Options.
5. You can add or remove keyboard languages.

We'll wait for the result.

How can I switch it back to the UK keyboard

I would ask Google like so:

how to change the windows keyboard

Thank you.

Here are the results: (Actually, these two proposed 'solutions' are one and the same.)

Change the system language: UK was already set as my preferred and default language, so this has no bearing on correcting the problem. 

Change the keyboard language:    The Country was already set to UK and the Windows display language was also already set to UK.  So this has no bearing. 

Again:  The switch from a UK to a US keyboard happens randomly and without my Doing anything, so I might be in the middle of typing a sentence in an email, and one minute the keyboard is UK, and then eventually I type a key that is different on the US keyboard and I realise that the keyboard has mysteriously changed!  This happens to me a few times a year, for years now!  Weird, no?

THANK you!!!   THIS is an ANSWER! 

That fixed it, and

it explains why my keyboard would change langue every so often -- I must have accidentally touched the windows key + space bar without realising!