Upgrade Path from Lion To High Sierra

I have just had to replace the hard disk of my MacBook Pro, which was previously running Sierra. It's quite a high spec, if a few years old. I was very happy that the computer automatically downloaded an OS and installed it onto the new disk.

The computer downloaded Lion (10.7.5), and the Sierra upgrade is dangled in front of me on the App store, but when I click "get", it says it requires a minimum of 10.8. There appears to be no way to restore my computer to Sierra! There are some links in the App Store for upgrading Lion to intermediate OS's - but following the links leads to empty pages.