courts held that the delegated legislation is ultra vires not because the decision is the wrong law - rather because it is the correct procedure has not been followed
Aylesbury mushroom case - minister of labour - setting up a new training board was supposed to consult
' any organisation appearing to him representative of substantial members of employers engaging in the activity concerned'
failed to consult the mushroom growers association - represented 85% of mushroom growers and hence the order was invalid