How do I type the backtick / Grave accent character on a (UK) Windows 8 touch keyboard?

How do I type backtick (i.e. `) on a Windows 8 touch keyboard?

This is a similar question to How do I type the tick and backtick characters on Windows? but the answer there covers real physical keyboard configurations while I need the Windows 8 virtual screen keyboard.

Here are some screen-shots of the keyboard that I am asking about:

The default touch keyboard in Windows 8 is quite simple and destined to be used on small screens.

The article How to Make the Standard Keyboard Layout Available in Windows 8 Touch Keyboard describes how to replace it by the full keyboard.

To add the standard keyboard layout to touch keyboard in Windows 8 :

1. Open PC Settings
2. Click/tap on General on the left side
3. On the right side under Touch keyboard, move the slider on the right to the end of the list
4. Turn on Make the standard keyboard layout available
5. When finished, you can close PC Settings.

On Windows 8.1, this setting has migrated to PC Settings -> PC and devices -> Typing.