Originally Posted by
SteveLAO
The policy is used as there are different methods for testing different metals, and in order to speed the process, reduce mistakes and make the whole process more efficient, different metals are separated out and kept apart so that if necessary they can be sent to different areas and departments for testing without unnecessary delay. It's also helpful for the markers to keep the punches separate too, so that punches may not get mixed up, as could easily happen. This is the reason why all assay offices work in this way, and have always done so.
Regrettably you will need to take up the VAT issue with HMRC, as we have no control over that. In the same way as many businesses operate, all are prices are quoted ex VAT.