i have always believed under uk law that it is illegal to feed live food to snakes (such mice etc) unless you have the permission of a vet because the snake will not take dead food, i maybe wrong, just sure i heard this somewhere. Also from your other posts you say you are feeding your snake wild caught toads, this is a little risky as the parasites that these toads could harbor, surely you are putting your snake in danger by doing this.

plus in another post you asked about firebelly toads, no to feeding to your snake as their toxic