2U.K.In section 22 (prohibition notices)—
(a)in subsections (1) and (2) (notices in respect of activities which are or are about to be carried on and involve a risk of serious personal injury), for the word “about”, in each place where it occurs, there shall be substituted the word “ “likely ”;
(b)for subsection (4) (notice to have immediate effect only if the risk is imminent) there shall be substituted the following subsection—
“(4)A direction contained in a prohibition notice in pursuance of subsection (3)(d) above shall take effect—
(a)at the end of the period specified in the notice; or
(b)if the notice so declares, immediately.”