I just got some new makes back from the London Assay Office , and managed a half decent photo of the mark, including, at the bottom, the special late Queen's platinum jubilee mark which ends at the end of this month
Silver hallmarks have four main elements: the town mark ILondon - leopard's head) , the date letter (x), the maker's mark (that's me, WMG in that specific shape), and the lion passant (which is the mark for sterling silver)
A weekend of polishing and pearl setting awaits me.