Why don't those inept clowns EE ("Nothing Anywhere") concentrate on getting their basic services to work properly before "rolling out" another worthless speed increase? Roughly 90% of the UK can't even get 4G and almost 60% can't get 3G coverage. You can safely ignore EE's "Coverage Maps" - they're "best guess" rather than actually measured results.
EE can't get even basic service to work at the tops of hills - a fundamental flaw in digital mobile telephony - because too many conflicting cell sites are "visible" to the handset. This wasn't a problem with NBFM analogue phones - because of "capture effect", strongest always wins.
Back in the pre-digital days, I was professionally involved with a trial of a digital add-on to the original NBFM cellular system. This had all the benefits of the basic NBFM service, but with the capacity of digital (it used a sort of Time-Division Multiplexing). Back in the late 80s we were getting practical data rates similar to today's 4G.....
Remember - the UK is the second most expensive place in the world to make a phonecall!