Re: £5.1 BILLION ?
As someone who was in this business I can definitely say that certain functionalities of the system could be handy. E.g. a full and up to date text about the despatch received on the personal radio. Or maybe location data pinpointing to an incident site with correct directions. And access to PNC from the PR. This of course works in vehicle based Mobile Data Terminals (MDT) but not all coppers operate in cars. So basically voice over 4G is a gimmick but access to all the data on personal radios would be just perfect.