All done, they were brilliant, changed my two-tone Essence straight away with out any problems for a lovely shiny new one. I got a new receipt too, it's covered for another 2 years. She said if it happens again just bring it back.
Hopefully it won't happen again! I was lucky and noticed when it fell off. This one is really hard to close too, at least I'll be aware if the clasp changes.
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Yes they exist, .........
I was very naughty and returned it, I was aware the free bracelet promotion was coming up and have re-ordered with a freebie

I'll post pics when the next one arrives