This facsimile of an old World War 2 British Government (never issued) poster I bought from the fabulous Barter Books in Alnwick (pronounced "Anick"), a week or so back.
Barter books is a dream for someone like me – a converted old railway station full of secondhand books! There's a coffee point and open log fires. You can sit in the old station waiting room and read all day if you like. And of course you can buy books, if you've got the dosh.
Alnwick Castle, by the way, is Hogwarts and can be seen (CGI enhanced) in some of the Harry Potter movies.