It would create a registry of weapons offenders and require a new state eligibility certificate for the purchase a rifle, shotgun or ammunition.

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Anyone who can't provide such proof as a driver's license, birth certificate or passport wouldn't be allowed to complete the purchase.

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Unilever then buys a certificate from the Green Palm Programme for every ton of palm oil they purchase.

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Everyone supplying electricity to end users must purchase some amount of that higher cost power: or pay a fine (by way of purchasing a renewables certificate) for not doing so.

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Apart from the Energy Performance Certificate there is nothing in the packs which a buyer needs to be concerned about in deciding whether to purchase a particular property and most purchasers are not even interested in them.

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