IP Address showing in Spain

I have an iMac and a MacBook Pro connected to my router via WiFi. When I access the Apple store and any other site that uses geolocation information on my iMac they think I'm in Spain, on my MBP they think I am in the UK.

I checked ipleak.net and it is the case that for some reason my iMac has a Spanish IP Address. I am not running anything funky on the iMac (I deleted my VPN app) so I cannot understand why the assigned IP address is in Spain. Both machines are running MacOS 10.15.

I would really appreciate it if anybody can shed any light on it?