I blame the gov for this ... GCHQ need the additional practice to further their understanding of what must sound like complete gibberish to the poor sheltered souls at Cheltenham eg "ahmorraoanratubehen"
Yes and it could also be something for terrorists to use if they decide to strike us up this neck of the woods, using phone detonated devices, turning the UG into clockwork cordial.
They had it years ago in Hong Kong. Full coverage for all networks anywhere on the MTR.
Also chip-and-pin, Oyster cards (Octopus in HK), broadcast radio feeders in road tunnels, etc, etc.