Continuing my thoughts from the above post (I could not modify it), I wonder if the mark is SILEDA LIMITED and not Scotcade Ltd. Or maybe they are affiliated closely enough. Sileda was incorporated in CEFN-Y-BEDD CLYWD which is in North East Wales. The Corning Museum of Glass has a catalog of their wares. The description is as follows: "Glassware is handmade in studio glassworks in the British Isles, then ornamented with fine silver in Sileda's workshops in North Wales. Note, that the bud vases on leaflet 1 were made in West Virginia.
Includes vases, perfumes, atomizers, powder boxes, silver deposit ware."