HS2 to improve mobile phone coverage along the railway

When HS2 trains first carry passengers, there won’t be a need for people to manually log on to a WiFi service, as they’re boosting the mobile phone coverage along the tracks.
However, as the HS2 trains will travel at speeds of up to 225mph, it would be unreliable to rely on phones connecting to mobile phone towers outside the trains, as by the time they’ve connected, they could well be out of range again. This is made harder by sitting in a large metal box, with metallicised an