According to the Trade Description Order (Usage of the Term “Halal”) 1975, the terms Halal can be defined as follows:

When the term is used in relation to food in any form whatsoever, in the process of trade or commerce as an aspect of trading or part of an aspect of trading for the referred food, the terms ‘Halal’, ‘Guaranteed Halal’ or ‘Muslim Food’ or any other terms that may be used to indicate or may be understood as meaning to indicate as permissible to be consumed by Muslims and allowed in their religion for the referred food to be consumed, must therefore mean the following, that is, the food for which such terms are being used:

(a). Does not stem from or consists of any part of or item from animals that are forbidden to Muslims by Islamic law, or animals that have not been slaughtered according to Islamic law.
(b). Does not contain any substance that is considered impure in Islamic law.
(c). Is not prepared, processed or manufactured using equipment or utensils that are not free from impurities as defined by Islamic law
(d). That, in the preparation, processing or storage stage, does not come in contact with or is stored near any kind of food that does not meet the requirements of para(s) (a), (b) or (c) or any substances that are considered impure by Islamic law.