Vintage stunning Frank Usher London dress- 1950s-60s? Floral Gold and Purple

Elegant floral dress featuring a stunning gold and purple design. Material is in gold and purple threads, quite heavy and constructed. It’s a vintage size 38, I am a 6 and fits me like a glove. The lining is sawn onto the material - brocade? See pic. The back has a hidden long zipper. Clearly carefully tailored and co strutted with original manufacturer tag still on ( see pink tag in photo). A head-turner of a dress, perfect for formal occasions. In very good shape for the age with no major faults I can see to the material.