D2 was ordered by his organisation to guide D1 (in a following car) to a pub where RCs lived. D1 placed a bomb in the pub which was defused but fulfilled the requirements of the offence of endangering people’s lives. HL upheld D2’s conviction for aiding the offence. HL said that it was unnecessary to show that D2 knew the precise details of the offence, but it sufficed that D2 knew the type of offence to be committed or the essential matters constituting the offence. Given that D2’s organisation carried out armed attacks on RCs regularly he must have been aware of the type of offence i.e. an armed attack.