Lottie Moss puts on a VERY leggy display in a thigh-split black satin gown as she attends a sexual health app launch party By Laura Fox For Mailonline Published: 21:05 BST, 22 September 2021 | Updated: 21:06 BST, 22 September 2021 Viewcomments She's never shied away from amping up the glamour. And Lottie Moss put on an extremely leggy display in a thigh-split black satin gown as she attended the launch of the iPlaysafe.App in London on Wednesday. The model, 23, amped up the glamour in a revealing black dress with platform heels as she arrived for the unveiling of the sexual health platform. Hard to miss! Lottie Moss put on an extremely leggy display in a thigh-split black satin gown as she attended the launch of the iPlaysafe.App in London on Wednesday Lottie stunned in the revealing black silk dress with a precariously high split that highlighted every inch of her slender pins. The half-sister of fashion icon Kate Moss sported her blonde tresses in a poker straight style that framed her pretty features. Lottie completed her look with towering silver sparkling platform heels as she posed at the launch. Perfect: The model amped up the glamour in a revealing black dress with platform heels as she arrived for the unveiling of the sexual health platform Glammed up: Lottie stunned in the revealing black silk dress with a precariously high split that highlighted every inch of her slender pins Montana Brown once again cut a stylish figure in a simple grey checked blazer and leather leggings as she attended the launch. The former Love Island star, 26, opted for the casual look as she attended the unveiling of the sexual health platform. Montana highlighted her svelte physique in the simple grey jacket and a black blouse which she teamed with the form-fitting leggings. Standing out: Lottie completed her look with towering silver sparkling platform heels as she made her entrance for the launch Chic: Montana Brown once again cut a stylish figure in a simple grey checked blazer and leather leggings as she attended the launch The reality TV star teamed her look with Converse trainers as she posed up a storm with guests including Vas J Morgan and Georgia Di Mattos. iPlaySafe.App is the first such application that offers users the chance to take an at-home STI test and then securely share their verified status with potential sexual partners. Lottie recently confirmed her romance with The Vamps star Tristan Evans, 26, as they made their first public appearance together. Simple: The former Love Island star, 26, opted for the casual look as she attended the unveiling of the sexual health platform Pose it up! At the event Montana was seen posing alongside singer Nadine Hermez, who opted for an oversized leather blazer and a cropped Fendi top It was revealed at the end of July that Lottie and Tristan were an item, after they were spotted getting up close and personal in Notting Hill two weeks earlier, before he spent the next evening cooking for her during a cosy night in together. Edgier than her usual type, Lottie has previously dated Made In Chelsea boys Alex in 2016 and Sam Prince, 24. Last year Lottie came out as pansexual, telling her Instagram followers: 'I'm pansexual so I don't really mind... any gender. It kinda changes every day as well. It depends on who I meet.' A pansexual person is attracted to someone or falls in love with them regardless of their biological sex or gender identity. Important: iPlaySafe.App is an application that offers users the chance to take an at-home STI test and then share their status (Georgia Di Mattos, Vas J Morgan and Bianca Dunne pictured) Share or comment on this article: All rights reserved for this news site (dailymail) and under his responsibility