The Clydesdale Bank has issued a limited edition ^5 note featuring the Forth Rail Bridge. It is the first produced in this country using a polymer base rather than the traditional paper.
I got one in change today - and the first thing you notice is it has a transparent panel in it.
Attempts to photograph it have proved unsatisfactory - so here is a link to it on the bank's website.
http://www.scotbanks.org.uk/media/079340-project_arrol_cb_bank_notes_6pp_a4_factsheet.pdfI notice they are going for more than double face value on eBay!