In a Sainsbury's checkout queue about half an hour ago, an employee of the Royal Mail (a postman, in other words) deposited his purchases on the conveyor behind me. These were;

* 2 packaged sandwiches.
* 2 pints (?) of milk.
* A lump of Edam.

and....

* A bottle of cider.

Has the royal mail driven it's workforce to drink?