Galvan London Serena Dress in size UK 6.
Beautiful Triacetate material.
Brand New with tags.
I also have this in size UK 10

Self: 80% triacetate, 20% poly
Lining: 100% poly
Made in UK
Hand wash
Fully lined
Criss-cross back straps with tie closure
Hidden back zip closure
Manufacturer Style No. 120SEDR002901BK