Ian, thank you for the information - I'll definitely be taking note of it I had thought that the hardboard would prevent flexing of the glass and the jiffy back would absorb the shocks received in transit. How wrong could I be?
Peter, I'm so disappointed - for both of us! I'll make you a new one over the Xmas period and send it in the new year. This time, I'll heed Ian's advice and you should receive it in one piece! As far as charities go, it's really up to you, but a cancer charity would be nice as I lost my grandad to cancer a few years back.
I'm kind of hoping that the others I sent out make it OK - otherwise, I'm going to be busy all over again