Minimal value for either, I'm afraid. They're the sort of notes that are often given away for free in newspapers or breakfast cereal.
The British Armed Forces Special Voucher has been demonetized; it's no longer worth 50 pence at British Army canteens.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis