+442073744897, +442075882139 and +442076061239, Moorgate Underground Station, Moorgate, London, EC2M 6TX, United Kingdom
A small series of payphones at the very busy Moorgate Underground Station. The first two here (+442073744897 and +442075882139) are at street level and have a decent ring to them both. There's two shops. One to the left (The Fresh Collection +442076284201) and another coffee shop opposite (Nero Express +442072566916) that has a bar at its window facing the payphones.
The other lone payphone (+442076061239) is situation underground by a newsagent (News Update +442072569056) and before the ticket gates. This one has a more shallow ring but as pictured you get some tourists looking at the information boards nearby.
A little interesting observation here is that all three area dial codes are different despite them being in the exact same postcode.