This is surprisingly well executed The consistency of the Windows 95 UI is what sells it.

This is oddly nostalgic.

Is there any plan to let users contribute entries or memories?

Actually, you could consider sharing the API, and if you create a communication protocol, people from various countries could contribute as well.

Yes, I have thought about doing this once the data model has settled a bit as the UK feed is still fairly new and there have been some rough edges to it. Some locations in the feed are incomplete, don't report any data or have incorrect location data so it has been fun sorting that out.

I'll have a look into what other countries have canonical fuel price feeds and if there's enough I'll look into how the data model could change to support them

It's a great way to pass the time, today's rank 1 is me!