I've been misinformed!

The act says

Film exhibitions for the purposes of advertisement, information, education, etc.

5 The provision of entertainment consisting of the exhibition of a film is not to be regarded as the provision of regulated entertainment for the purposes of this Act if its sole or main purpose is to—

(a) demonstrate any product,
(b) advertise any goods or services, or
(c) provide information, education or instruction.

Film exhibitions: museums and art galleries

6 The provision of entertainment consisting of the exhibition of a film is not to be regarded as the provision of regulated entertainment for the purposes of this Act if it consists of or forms part of an exhibit put on show for any purposes of a museum or art gallery.


So artists do seem to be all right, providing they are actually in an official museum or art gallery. If they are in a village hall, on the other hand, its not clear. (surprise!)

And I'm sure everyone is pleased to learn that filmed advertisements are excluded in all circumstances.