I was in LloydsTSB t'other day and saw a green collecting box with a Barnados sticker asking for unwanted foreign coins. As it happened, I had a few kicking around (having come back from USA recently), and they have now found a new home.
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(No connection with LTSB or Barnados, but happy to have found a useful home for those pesky foreign coins that usually float around the bottom of my desk).