Originally Posted by Agaricus bisporus
It is illegal to use any transmitting device above a certain level (30'?)above ground in the UK (tall buildings count as ground) unless licenced. This is an old Post Office regulation and carries stiff penalties.
How about just "It is illegal to use any [rf] transmitting device unless licenced"? That reference to 30' is spurious. Go and re-read the 1949 Wireless & Telegraphy Act