New Roads and Street Works Act 1991

111 Emergency works

(1) In this Part “emergency works” means works whose execution at the time when they are executed is required in order to put an end to, or to prevent the occurrence of, circumstances then existing or imminent (or which the person responsible for the works believes on reasonable grounds to be existing or imminent) which are likely to cause danger to persons or property.

(2) Where works comprise items some of which fall within the preceding definition, the expression “emergency works” shall be taken to include such of the items as do not fall within that definition as cannot reasonably be severed from those that do.

(3) Where in any civil or criminal proceedings brought by virtue of any provision of this Part the question arises whether works were emergency works, it is for the person alleging that they were to prove it.