I can confirm that as a TalkTalk user, any of the "locator sites" just state the TT POP as my "location". Depending upon the IPv4 address I have been allocated, it might be Lowestoft, Cambridge, Bury (the Lancashire version), Guildford, Nottingham, etc, . . .
The one place the "locator sites" never mention is Bury St. Edmunds, Suffolk.