Lovely vintage foil gold-toned evening dress by Trina Lewis & Marjon Couture, London. 
Brand size UK12 US10 EUR38.
Best to fit S UK8. 

Features:
Fit & flare silhouette.
Maxi length.
Bandeau neckline with V-overlay.
Sleeveless.
Strapless.
Boned bodice.
Diamanté bow detail at waist.
Full skirt w/netting below.
Rear hidden zip closure.
100% polyester.
Fully-lined in triacetate.

Approx. Measurements:
Bust (pit-to-pit): 40cm (double for all round).
Waist: 33cm (double for all round).
Centre-back length: 125cm.

Condition:
Very good overall. Few minor pulls but not noticeable, also a heel graze to rear hem (not a hole) - please see last two photos.