United Kingdom of Great Britain and Northern Ireland
PART 5 Offences under Domestic Law
England and Wales
55 Meaning of “ancillary offence”
(1) References in this Part to an ancillary offence under the law of England and Wales are to—
(a) aiding, abetting, counselling or procuring the commission of an offence,
(b) inciting a person to commit an offence,
(c) attempting or conspiring to commit an offence, or
(d) assisting an offender or concealing the commission of an offence.
(2) In subsection (1)(a) the reference to aiding, abetting, counselling or procuring is to conduct that in relation to an indictable offence would be punishable under section 8 of the Accessories and Abettors Act 1861 (c. 94).
(3) In subsection (1)(b) the reference to incitement is to conduct amounting to an offence of incitement at common law.
(4) In subsection (1)(c)—
(a) the reference to an attempt is to conduct amounting to an offence under section 1 of the Criminal Attempts Act 1981 (c. 47); and
(b) the reference to conspiracy is to conduct amounting to an offence of conspiracy under section 1 of the Criminal Law Act 1977 (c. 45).
(5) In subsection (1)(d)—
(a)the reference to assisting an offender is to conduct that in relation to a relevant offence would amount to an offence under section 4(1) of the Criminal Law Act 1967 (c. 58); and
(b)the reference to concealing an offence is to conduct that in relation to a relevant offence would amount to an offence under section 5(1) of that Act.
56 Saving for general principles of liability, etc
(1) In determining whether an offence under this Part has been committed the court shall apply the principles of the law of England and Wales.
(2) Nothing in this Part shall be read as restricting the operation of any enactment or rule of law relating to—
(a) the extra-territorial application of offences (including offences under this Part), or
(b) offences ancillary to offences under this Part (wherever committed).
Crimes against humanity
Genocide
War crimes
EDIT.