Misconduct in public office is an offence at common law triable only on indictment. It carries a maximum sentence of life imprisonment.
cps.gov.uk/legal-guidance…
a public officer acting as such;
wilfully neglects to perform his duty and/or wilfully misconducts himself;
to such a degree as to amount to an abuse of the public's trust in the office holder; without reasonable excuse or justification.
en.m.wikipedia.org/wiki/Chief_con…