Comment by toast0

Those IPs are owned by Google and NTT, who both run large international networks and can redeploy their IPs around the world when they feel like it. So lookup based geolocation is going to be iffy, as you've seen.

Traceroute to those IPs certainly looks like the networking goes to London.

The google IP doesn't respond to ping, but the NTT/Verio ones do. I'd bet if you ping from London based hosting, you'll get single digit ms ping responses, which sets an upper bound on the distance from London. Ping from other hosting in the country and across the channel, and you can confirm the lowest ping you can get is from London hosting, and there you go. It could also be that its connectivity is through London, but it's elsewhere --- you can't really tell.

Check from other vantage points, just to make sure it's not anycast; if you ping 8.8.8.8 from most networks around the world, you'll get something nearby; but these IPs give traceroutes to london from the Seattle area, so probably not anycast (at least at the moment, things can change).

If you don't have hosting around the world, search for public looking glasses at well connected network that you can use for pings like this from time to time.