Can I type backslash with UK extended keyboard (virtual) layout and US physical hardware

Question

I have a US physical keyboard layout, with Windows keyboard set to UK extended keys. Is there a way to type backslash, despite the lack of the usual UK physical backslash button? On How can I type a backslash with no backslash key?, one answer proposed is Right Alt + (what looks like \ on the physical keyboard). The latter works for me when my keyboard is set to UK, but not when it's set to extended UK (which I prefer because it gives access to accented letters easily). Does anyone have a suggestion, other than just frequently switching between keyboards?

Answer 1

Creating a custom keyboard, based on UK international but with a custom positioning of \, is an option, eg using microsoft keyboard layout creator. I found the tutorial here helpful. Also note that microsoft keyboard layout creator runs into problems when run from a filepath with spaces in, so the .exe file needs to be put into an appropriate folder (see the answer from 09/02/2015 here).