Mobile and broadband providers Vodafone and O2 (VMO2) have today become the last two major UK network operators to reach a special deal with infrastructure firm BAI Communications (BAI), which will enable them to deploy 4G and 5G based mobile services across the entire London Underground (stations and tunnels).

At present, BAI holds a 20-year concession deal with Transport for London (TfL), which was signed in June 2021 (here) and allows them to build the new mobile infrastructure itself and to then make it available via wholesale for Mobile Network Operators (MNO) to harness.

The deal with BAI followed a successful trial on the Jubilee Line (eastern half of the line), which saw TfL install a neutral host distributed antenna system (DAS) that was supported by hundreds of kilometres of new fibre optic cable laid in tunnels for data capacity (fitted outside of operational hours). All four MNOs took part in that trial.

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