Was a good pub that was.
Seriously my first issue went missing thanks to Micky got a replacement, ever grateful.
Scroats if they are being tampered with, it is actually a criminal offence.
84Interfering with the mail: general.
(1)A person commits an offence if, without reasonable excuse, he—
(a)intentionally delays or opens a postal packet in the course of its transmission by post, or
(b)intentionally opens a mail-bag.
(2)Subsections (2) to (5) of section 83 apply to subsection (1) above as they apply to subsection (1) of that section.
(3)A person commits an offence if, intending to act to a person’s detriment and without reasonable excuse, he opens a postal packet which he knows or reasonably suspects has been incorrectly delivered to him.
(4)Subsections (2) and (3) of section 83 (so far as they relate to the opening of postal packets) apply to subsection (3) above as they apply to subsection (1) of that section.
(5)A person who commits an offence under subsection (1) or (3) shall be liable on summary conviction to a fine not exceeding level 5 on the standard scale or to imprisonments.
You set the ball rolling by writing to head postmaster, if it gets through. They have to investigate. So there.