One of the big things Google announced at the Pixel 2 launch was that the phone would have an eSIM. What you might not have known is that the use of an eSIM is restricted to people on Google's Project Fi mobile network. And because Project Fi isn't available in the UK, you're going to have to use a regular nano SIM like every other phone out there.
That's kind of a shame really, seeing as one of the benefits of an eSIM is that you can switch networks without having to swap out a SIM card. It's also an awful lot smaller than even a nano SIM card and tray, so there's more room for extra bonus hardware on the inside - which is also true of removing the headphone jack.
We've reached out to Google to see if UK networks will be supporting the eSIM, but so far it's not clear why its opted to include both versions. Maybe because eSIMs aren't that widespread and everyone needs time to adjust, or maybe it's doing that thing Android does best - giving people a choice.
Top image: Pixel 2 XL's SIM card slot