Bristol has a 5G testbed
SIL @ Bristol Uni has a 5G testbed, with KCL and Bath University.
There have been a number of tech use cases, the most recent of which was http://www.bristol.ac.uk/engineering/research/smart/news/2019/orchestrating-the-orchestra-5g-enables-musicians-to-perform-across-locations.html
They are doing some interesting stuff with the spec..
Kit is deployed from multiple vendors including Voda..