reg 4 Exception for trade fairs and exhibitions
(1) Nothing in these Regulations prevents the display, of radio equipment which does not comply with these Regulations, at a trade fair, exhibition or similar event provided that a visible sign clearly indicates that the radio equipment— (a) is not in conformity with Part 2, and (b) may not be made available on the market or put into service until it has been brought into conformity with Part 2. (2) Nothing in these Regulations prevents the demonstration, of radio equipment which does not comply with these Regulations, at a trade fair, exhibition or similar event provided that all reasonable measures have been taken to avoid harmful interference, electromagnetic disturbances and risk to health and safety of persons, domestic animals or property.