Justices of the Peace Act 1997

52 Immunity for certain acts beyond jurisdiction

An action shall lie against any justice of the peace or justices' clerk in respect of any act or omission of his—

(a) in the purported execution of his duty—

(i) as such a justice; or

(ii) as such a clerk exercising, by virtue of any statutory provision, any of the functions of a single justice; but

(b) with respect to a matter which is not within his jurisdiction,

if, but only if, it is proved that he acted in bad faith.