DMM have released a document detailing a list of products that are being recalled. This includes a batch of DMM Boas which I know many people have. I myself have a few, one of which falls within the highlighted batch. It therefore being removed from use until further details from DMM are released.

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You can view the list of models and serial number range here.

DMM have updated the recall criteria in this additional document published on the 14th of September 2015.