[i.h]

probably worth clarifying that they can easily translate it to a general location (depends on the ISP, but at best it's the nearest town). It really does depend on the provider though, the smaller ISPs might not be any more specific than "London" or "Manchester" because that's where their HQ and/or infrastructure is whereas the likes of BT/Virgin/TalkTalk/Sky have infrastructure everywhere.

If they wanted anything more granular like what most people consider a "physical address", they'd need justifications, court orders and warrants to get the ISPs to give that up