As I say, strange parallel universe. My local hospital provides free wifi, so you could make calls even if mobile phones were blocked.
But the reason you weren't allowed to use a mobile in a hospital was because of a fear it might interfere with equipment. That's been disproved I think, but for handsets. However a device that sends out continuous signals across a broad spectrum of frequencies (aka a jammer) would be much more likely to interfere with equipment.
(yes, some hospitals charge exorbitant a amounts to call a patient, but I really doubt they are enforcing it with jammers)
hand myself to whom? I don't think OfCom does arrests, and I do not believe my local police who took an hour to turn up to the scene of a casualty that had civilians directing traffic are interested in investigating the use of DECT phones without proper certifications.
I bought it for a purpose, and when it finished that purpose I took it home, as I needed a new phone.
I use it because I have it, it works fine and causes no problems.
And this from the man inciting people to interfere with mobile networks and strangers telephones because they are a bit annoying. Inciting a crime that carries a penalty of up to 2 years jail and
unlimited fines.
A faraday cage is not a jammer and does not require a license. This link kind of disproves your suggestion that rail companies use jammers. Also, while I imagine it's possible to get a licence to say block signals on a military base or a company with a reasonable fear of industrial espionage I really doubt they would allow it to be put on a train which crosses the country often only being metres away from someone else's land. Imagine if the poor cafe by the station lost their mobile signal every time a train pulled in!
Why? There are 11 other carriages where you could use your phone. I am ok for the quiet carriage to be for people not using electronic devices. I just wish they would place them a fixed position along the train. Sometimes I am forced to get on (with a bike, so it's hard to move carriages) when I have no intention of being quiet