The testbed will be used to trial a range of different 5G hardware and use cases under live conditions.
O2 announced yesterday morning that it has written to every CEO on the FTSE 100 stock market index to invite them to take part in trials.
A spokesperson said: "5G, when it becomes available, has the potential to transform every corner of life and society. By encouraging businesses to implement 5G technology early, productivity and efficiency savings can be made that will have a national impact."
The invitation comes several months after the UK's latest spectrum auction, when O2 spent £523.6 million to buy 40MHz of 2.3GHz and 40MHz of 3.4GHz.
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