In the UK there are strict rules about selling precious metals.  Under the 1973 Hallmarking Act, any item of silver that is above 7.78g must be hallmarked.  Items of gold above 1g must also be hallmarked.

At present, all of my items fall below this requirement and do not require hallmarking.  

However, I do have our hallmark registered with the London Assay Office and if you would like a piece to be hallmarked please get in touch.  Please bear in mind that it can take a few weeks for the process to be completed and there would be an additional charge to cover the costs.  Please note that the hallmark would be lazered
It is worth noting that 925 on silver is not a hallmark and with the right tools can be stamped on to silver by anyone.