no defence of consent to murder
terminally ill people must take their own lives, physically incapable - wish denied, anyone who helps - guilty of assisting suicide (pretty)
law commission consultation paper - suggested extending range of situation in which consent effective and removing some anomalies
agued d should rely on v's consent to an act intending to cause injury but not intending to cause serious injury
circumcision, tattooing, ear piercing kept as special case
suggested adopting rules for boxing
not available for horseplay or sexual activities