About Deia London

Skin confidence, without compromise.


Deia London was created by Siân — a qualified skin therapist and professional performer — for people who want real results, not trends or quick fixes.


Working across West End theatre, television, and film, I’ve supported skin under some of the most demanding conditions: heavy makeup, intense lighting, sweat, stress, long days, late nights, and very little room for error. That experience shaped how I treat skin today.


Because skin doesn’t exist in isolation — and neither do the people living in it.


Welcome to Deia London.

Sian Deia

  • Rooted in performance, designed for real life

    While many of my clients are performers, creatives, and industry professionals, you don’t need to be on stage to be treated like one.


    I bring the same level of precision, care, and honesty used for West End, TV, and film clients to everyone who walks through the door.

    • No over-treating.
    • No over-selling.
    • No unnecessary steps.


    Just skin — treated properly.

  • Skin with an edge

    Deia London is about quiet confidence.

    • Not loud.
    • Not overdone.
    • Not dependent on filters or trends.


    It’s about understanding your skin, trusting the process, and feeling confident with or without makeup.

    • Education over overwhelm.
    • Consistency over quick fixes
    • Results that actually last.