That's an interesting article Steve and I enjoyed reading the link. I've got a carrier bag full of pre decimal coins but they are probably not worth that much according to that report.
That bit about the Llandudno money was interesting too and the notes they showed were the Coron ( five shillings in old money and 25p nowadays ) I've got a five shilling note somewhere in the house and from memory I bought it from a Richard Williams who lived in Craig Y Don