Hi there, I use an tag 2 myself daily, I can't say I have experienced this issue myself. It might have been a glitch possibly? They rely on other devices around them to pin point their position from what I understand.
I am wondering if momentarily your phone had locked onto a mast nearer Liverpool than where you were or if you use a vpn on your phone for security? Just a thought, I know sometimes when I log into Instagram or other apps when I get a new phone I get emails asking if I am trying to log in from sometimes from other countries believe it or not. That's because my traffic is passed through multiple servers for security and encrypted.
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