Thank you everyone for your responses. (No, from London, and have no idea where the coins came from.) Do they have any value or shall I just pop them back in the envelope with a note for my lucky offspring!
I have five one sided coins – three stamped Edward V11 and two stamped George V. They are uniformly smooth – and with uniform edges. They don’t appear to be shove ha’peny coins (too smooth?). They are not Model coins as have no stamp on the reverse at all. I can't find anything online anywhere that looks like them. So I have joined this forum to see if anyone can help. thank you