DfT investigates upgrades to mobile and Wi-Fi services for train passengers

[Oxonian]

This is not an O2 article, but it is a topic of general interest that is occasionally raised in this forum :- 

DfT investigates upgrades to mobile and Wi-Fi services for train passengers

https://www.ianvisits.co.uk/articles/dft-investigates-upgrades-to-mobile-and-wi-fi-services-for-trai...