@ChaddersYou will need to use the web version of
https://www.google.com/android/findAs long as it has wifi or mobile coverage then it will work, just sign in with the same google account as the phone.
Best thing is its free and you can find full information here:
https://support.google.com/accounts/answer/6160491?hl=en
Current Phone: Sony XPeria Pro-I and Motorola Razr 5G
I also have a Planet Computers Gemini
I work in IT as an Enterprise Messaging and Collaboration Tools Administrator (Office 365, Slack and much much more) and manage hardware both Mobile and Desktop / laptop, my desk is a bit like PC World
--
We are all customers and dont have access to any o2 accounts