language - Get Cortana to work in English (UK) for Windows 10

I upgraded to Windows 10, and Cortana doesn’t seem to be available based on the Start Menu:

Cortana isn’t supported in the region and language you’ve selected.

but when I click the link, it takes me to this page:

which suggests it should be available in the UK, since I've checked

• my language settings are English (UK),


• I have the English (UK) language pack installed, and


• the speech settings are also set to English (UK).

I think this is everything, right?  It certainly ticks the boxes in the Microsoft help article.

How can I get Cortana up & running?