Actually a five pound note, from the old british currency. I am a Brit and grew up with this currency. I remember the original one pound notes. At first they were blue, then became green, but they always had the portrait of the Queen on them, although this is a very young queen. The pound note no longer exists, replaced by a coin, but I found this five pound note in my souvenirs, probably no longer accepted as legal currency. As a Brit this is my interpretation of pound.

I notice that even the signature of the Chief Cashier of the Bank of England is on the note, as it always was.