Two step verification wrong location?

hey everyone.

I turned on two step verification on my iMac.

Then looked at my iPhone and had to verify however when I did a message popped up on the mac saying my account was logged in on a device near London England.

My phone is actually in Belfast Ireland... and I knew it was me as the message popped up the second I clicked on verify on the iPhone.

Is this normal? Do I 'allow'?