an officer appointed by the Secretary of State, an officer appointed in writing by the Worshipful Company of Fishmongers, or a police officer may seize any salmon, trout or freshwater fish bought, sold or exposed for sale by, or in the possession for sale of, any person in contravention of the Salmon and Freshwater Fisheries Act. Orders and warrants to enter suspected premises Where from a statement on oath of a water bailiff or any other officer of the Agency, or any person appointed by the Secretary of State, it appears to any justice of the peace that the person making the statement has good reason to suspect that any offence against the Salmon and Freshwater Fisheries Act is being or is likely to be committed on any land situated on or near to any waters, the justice may by order under his hand authorise him, during a period not exceeding 24 hours to be specified in the order, to enter upon and remain on the land during any hours of the day or night for the purpose of detecting the persons committing the offence. Any justice of the peace upon an information on oath that there is probable cause to suspect any offence against the Salmon and Freshwater Fisheries Act to have been committed on any premises, or any salmon, trout, freshwater fish or eels to have been illegally taken, or any illegal nets or other instruments to be on any premises, by warrant under his hand and seal may authorise any water bailiff or other officer of the Agency, or any person appointed by the Secretary of State, or any constable, to: enter the premises for the purposes of detecting the offence or the fish, nets or other instruments, at such times of the day or night as are mentioned in the warrant, and to seize all illegal nets and other instruments and all salmon, trout, freshwater fish or eels suspected to have been illegally taken that may be found on the premises. This type of warrant is only valid for one week. Power to apprehend persons fishing illegally If any person, takes or kills any fish where the taking or killing constitutes an offence under the Salmon and Freshwater Fisheries Act, is found on or near any waters with intent to take or kill any fish where the taking or killing would constitute an offence under that