Well there should have been someone around to answer queries. We have an H24 number we can call (which I just did!) to enquire (also happened to be a buddy of mine so he was quite happy to spend a few mins with his nose in the book). You mentioned the a DG clerk pre-signed the checklist. Do I understand without looking at the Declaration & the packaging? Should be shot if that the case. Our outfit regularly blocks DG freight because the Shipper's Declaration contains errors.
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rgds Rat