As it is required in advance, such measures in the Licensing Act affect all entertainment, whether these would subsequently prove to cause any noise nuisance or not.
In the case of non-amplified shanty performances - there is little danger of any over-heating but there are dangers presented to the event by assumptions that all entertainment must be subject to the advance red-tape of additional licensing permission. The fitting of an oil temprature
Encouraging this dangerous approach is to encourage the common but erroneous assumption, that the removal of the need for additional entertainment licensing means that this exposes the public to noise nuisance.
Would you think is sensible to fit an oil temperature gauge to all bicycles?