Hi Viv Haig,
Based on your description, it seems that there is no keyboard shortcut from say desktop or within an application to the apps list.
However, as a workaround, we could try to create direct shortcut to go to “All Apps” page and pin it to taskbar. Please try the steps below.
1. Open Windows Explorer and go to C:\Windows\System32 folder and you'll get "Search.scf" file after scrolling down a bit. Alternatively you could open "System32" folder directly by providing System32 command
in RUN dialog box.
2. If you double-click on Search file, it'll launch All Apps page.
3. To create a shortcut, right-click on it and select "Send to -> Desktop (create shortcut)" option.
4. That's it. It'll place a direct shortcut on Desktop. You could rename it to your desired name.
Please refer to the link:
Create Direct Shortcut to “All Apps” Page of Windows 8 Start Screen and Pin it to Taskbar:
http://www.askvg.com/create-direct-shortcut-to-all-apps-page-of-windows-8-start-screen-and-pin-it-to-taskbar/
Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.
Best Regards,
Tao
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.