Last Minute Prom! Discover these stunning maxi dresses now available with a fast 48 hour delivery. Portia & Scarlett prom gowns are in high demand but we have a range of select sizes available in the UK for next day availability. Explore our Prom SOS shop if you’re in need of an emergency dress for your special occasion. These dresses are usually on a back order of 5 weeks, so what you see on the website is a select range of sizes ready to be shipped now. Plus free UK delivery and free UK returns.