I live in an area which is significantly closer to London than to Manchester. However, when visiting 18.104.22.168/help , it tells me that I am connected to Manchester (MAN) instead of London (LHR). I know this because my previous ISP (Sky) allowed me to connected to LHR automatically but after switching to a new provider (Vodafone) it is now defaulted to MAN.
ISP egress points on their networks are fun. I’m usually routed to Denver on mobile vs. Dallas or Houston with my normal land based ISP. My Satellite ISP usually drops me in Atlanta or some other ‘interesting’ egress location.