I think the best way to help her would be to start with a conversation about her preferences. Ask her what styles she’s been thinking about, what she feels she’s missing in her current wardrobe, and what makes her feel confident when she dresses. If she’s unsure, maybe offer to go shopping together and explore different styles. This way, you’re actively involved in her journey, and it also gives her the space to express what she feels comfortable with. Encourage her to try something new, but let her lead the way. And the most important, you could go to Dress Alterations services in one of London boutique and they may help you in a best possible way