Well they have been rolled up in UK coin bags so hopefully they should be able to see that all the coins are the same without unwrapping...

The oldest coin is probably from the 1970s, I have sold the copper pennies and nickel nickels to a scrap metal dealer in Poland (I don't think this is illegal outside of Canada, although they do have the Queen's head so not sure about in the UK ), and sold the rare years etc to collectors.