(click on the map for a larger image)
Consumers in 99.7% of the UK’s premises (homes and offices) can already
make and receive phone calls and send and receive text messages using
mobile connections from at least one operator.
However, some
premises, typically in more sparsely populated areas, still do not have
outdoor 2G mobile coverage from any operator. These premises are
defined as being in a ‘complete mobile not-spot ’.
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Mobile phone coverage is still very poor in the UK as the OFCOM map above shows with red spots, so if you are traveling in the UK it's still a good idea to keep an amateur radio in the car in case you need to communicate with the outside world.
OFCOM report
2m Repeaters
70cm Repeaters
BBC Story