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Aesthetic Clinic Mayfair

Aesthetic Clinic

Mayfair, London

Aesthetic Clinic Mayfair

Our Clinic in Mayfair, London

Welcome to Define Clinic, the premier aesthetic clinic Mayfair clients trust for expert care in aesthetic treatments right in the heart of London.

Welcome to Define Clinic, the premier aesthetic clinic Mayfair clients trust for expert care in aesthetic treatments right in the heart of London. At our clinic, located conveniently at 9, 10 Windmill Street, we offer a wide array of aesthetic and wellness treatments to help you achieve your beauty and wellness goals. Whether you’re seeking advanced skin rejuvenation or body contouring, Define Clinic has you covered.

Under the leadership of Dr. Benji Dhillon, our team of highly skilled practitioners brings years of experience and a commitment to using the latest technologies. From non-surgical anti-ageing treatments to innovative body contouring solutions, our holistic approach ensures that each treatment plan is carefully crafted for every individual who visits us. Define Clinic is setting a new standard of excellence among aesthetic clinic Mayfair locations and throughout London.

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Treatments Our Aesthetic Clinic Mayfair Offers

Our clinic offers a full spectrum of advanced aesthetic treatments for both the face and body. Every treatment is designed with your unique needs in mind, ensuring that each client leaves feeling rejuvenated, refreshed, and more confident.

  • Anti-Wrinkle Injections: Smooth out fine lines and wrinkles for a youthful, refreshed look. This treatment, expertly administered by our team, is perfect for those looking to enhance their natural beauty while maintaining a subtle, natural appearance.
  • Dermal Fillers: Add volume to key areas like the lips, cheeks, and jawline with our high-quality dermal fillers. Define Clinic ensures each treatment is tailored to achieve balanced, harmonious results that enhance facial features.
  • CoolSculpting: Stubborn fat in areas like the abdomen, thighs, and arms can be targeted and reduced through this innovative fat-freezing treatment. CoolSculpting provides visible results without surgery, making it ideal for those looking for body contouring options.
  • HIFU (High-Intensity Focused Ultrasound): This non-surgical facelift alternative lifts and tightens the skin, stimulating collagen production for improved elasticity. HIFU is a popular choice at our clinic for clients looking to achieve a natural, youthful lift to their skin.
  • miraDry® for Hyperhidrosis: For clients experiencing excessive underarm sweating, miraDry® provides a lasting solution by eliminating sweat glands in the targeted area. This treatment can significantly improve comfort and confidence.

And more!

Ours is among the most comprehensive range of services an aesthetic clinic Mayfair has to offer. Our commitment to aesthetics goes beyond skincare alone to encompass a holistic approach to your beauty and wellness goals.

Dr Benji Dhillon with patient for dermal fillers at Define Clinic Mayfair

About Our Aesthetic Clinic Mayfair

Define Clinic stands out among any other aesthetic clinic Mayfair has to offer by combining expertise in both aesthetics and wellness with an unparalleled commitment to client care. Our team believes that beauty and wellness go hand-in-hand, and we take a holistic approach to every service we offer. This means that each client receives a thorough initial consultation, where we assess individual needs, goals, and preferences to develop a personalised treatment plan.

Led by Dr Benji Dhillon, the Define Clinic team is recognised across London for excellence in aesthetic treatments. Dr. Dhillon, an esteemed aesthetic practitioner, is known for his advanced techniques and his focus on natural-looking results. Together, the Define Clinic team has established the clinic as a trusted name for clients in Mayfair and beyond who value safety, quality, and integrity.

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REVIEWS

What Our Clients Say

Our clients’ satisfaction is a testament to our commitment to quality care.

Read our reviews to see why Define Clinic is the aesthetic clinic Mayfair clients recommend for personalised, transformative results.

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    Five stars! The hygiene at Define Clinic London is immaculate, the calming ambiance made me feel at ease from the moment I walked in. The staff were professional and knowledgeable, guiding me through a quick microneedling treatment that delivered visible results. I loved the convenience of being able to book an appointment online and the easy access from public transport. If happiness had a location on Google Maps, it would be here. I will definitely be back for more skin boosters and recommend this clinic to anyone looking for top‑notch skincare.

    Claire Gerring

    2nd April 2026

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    From the moment I arrived at Define Clinic Beaconsfield the experience was seamless. The staff were friendly and knowledgeable, the clinic was spotless, modern and welcoming. I felt comfortable asking about microneedling near me and got clear advice. I left feeling confident and will definitely return.

    Ollie O’Hanlon

    2nd April 2026

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    Karen McGuire

    1st April 2026

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    I recently visited Define Clinic in Beaconsfield after seeing the incredible results they shared of Ulrika on Instagram, and I can honestly say the experience with Dr Benji Dhillon, exceeded all expectations. From the moment I walked in, everything felt professional, welcoming, and thoughtfully designed to put you at ease. The team were knowledgeable, attentive, and took the time to really understand what I was hoping to achieve. They explained every step clearly, which made me feel completely confident and comfortable throughout the process. And the results? Absolutely amazing. The outcome is natural, refined, and exactly what I had hoped for (if not better). It’s rare to find a clinic that combines such high standards of care with genuinely outstanding results, but Define Clinic truly delivers on both. A well-deserved 5-star experience, and I wouldn’t hesitate to recommend them to anyone considering treatment.

    Laura Goodfellow

    1st April 2026

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    I love the calming ambience at Define Clinic London. The staff are friendly and professional, the clinic is spotless and the atmosphere is soothing. The level of professionalism impressed me, and the attention to cleanliness gave me confidence. I felt well taken care of by every member of the team. I’m excited to return for my next treatment . Highly recommend.

    clare barclay

    1st April 2026

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    I was really impressed by how clean the space was at Define Clinic London. The team were friendly, knowledgeable and made me feel relaxed and welcomed from the moment I walked in. They answered all my questions about microneedling for me in a clear and helpful way.

    Lee Richards

    1st April 2026

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    Dr Arreni was incredibly warm, welcoming, and easy to talk to. What really stood out was how thoughtfully she talked me through my options. She took the time to understand exactly what I was hoping to achieve and offered honest, realistic guidance — including clear timelines for recovery — without ever making me feel rushed or pressured. There was absolutely no sense of upselling, just genuine care and professionalism.

    For something like an injectables appointment, it was surprisingly enjoyable. I felt listened to, understood, and completely confident in her approach.

    The journey to the clinic was 100% worth it, and I can confidently say I’ve found my go-to practitioner. I’ll definitely be returning as a long-term client and wouldn’t hesitate to recommend her to anyone considering treatment.

    Michelle Mikulsky

    14th March 2026

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    Friendly, thorough, transparent and offering excellent treatment – you know you’re in good hands here while the place feels not at all intimidating

    Ingeborg van Lotringen

    12th March 2026

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    Dr Arreni was amazing! This was my first time getting any sort of work done and I couldn’t have been more happy with my results, Dr Arreni made sure everything was natural and just the way I wanted. I was made to feel comfortable throughout the entire process, which really eased any nerves I had. She was so nice and easy to talk to and I will 100% recommend her!

    Jasleen Dhillon

    9th March 2026

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    I heard of Define Clinic through my workplace after they came and introduced their new clinic opening in Fitzrovia. I’ve always been interested in aesthetics and injectables but I find the market so oversaturated and it’s almost impossible to find a practitioner that you can trust and for the right price too.

    I had my initial consultation with Dr Arreni for hyperpigmentation and under eye hollowness and she had a thorough chat with me about my skin goals and what she would suggest. We did a skin scan and she made a treatment plan for me which was emailed with pricing. The clinic also offers 0% financing which was great. I never felt like I was being pushed to buy anything and she was honest about expectations and told me what I would see with what treatment I would get. I decided to start with tear trough filler as that was my biggest concern and my appointment with Dr Arreni was smooth and pain free. She was extremely friendly and kind and made me feel at ease and I am overjoyed with the result. I feel like I can really trust her and her expertise as a skilled doctor and I will most likely keep this as my clinic of choice for all other treatments I would want in the future.

    Shenhead

    8th March 2026

Meet The Team

Our skilled team is committed to maintaining the highest standards of care, bringing expertise, compassion, and a dedication to client satisfaction to every treatment.

Aesthetic Clinic Mayfair

Serving Mayfair

Situated at the heart of Mayfair, Define Clinic is easily accessible for London clients seeking premium aesthetic treatments. Our location on Windmill Street provides convenient access for clients from both the local area and nearby neighbourhoods. We understand the busy lives of our clients and offer flexible hours to ensure that our services can fit seamlessly into your schedule. As an aesthetic clinic Mayfair recognises, Define Clinic remains dedicated to serving the London community with services tailored to their needs, making us a trusted choice for aesthetic care.

About The Area

Define Clinic’s aesthetic clinic is located within one of London’s most prestigious districts. Known for its luxury boutiques, iconic architecture, and historical sites, Mayfair offers a unique blend of elegance and tradition. Our location puts clients in close proximity to many of London’s finest shops, restaurants, and cultural attractions, creating an experience that extends beyond the clinic itself.

Opening Times

Monday 09:00-18:00
Tuesday 09:00-18:00
Wednesday 09:00-18:00
Thursday 10:00-19:00
Friday 09:00-18:00
Telephone Number 0203 336 4100

FAQs

What sets Define Clinic apart as an aesthetic clinic Mayfair clients choose?

Define Clinic is led by experts in aesthetic care, delivering top-quality, personalised treatments. We are committed to using the latest technology and innovative techniques, ensuring safe, effective results for our clients.

Is there a consultation fee at Define Clinic?

Yes, Define Clinic charges a consultation fee, which allows us to provide a comprehensive assessment and create a personalised treatment plan that addresses your unique goals and needs.

What treatments does Define Clinic offer?

Define Clinic offers a variety of services, including anti-ageing treatments, skin rejuvenation, and body contouring. Each service is tailored to meet the specific needs of our aesthetic clinic Mayfair clients.

Is Define Clinic a safe place for aesthetic treatments?

Absolutely. Define Clinic adheres to stringent safety and hygiene standards, with all practitioners fully trained in their fields. We maintain a safe, sanitised environment and follow best practices in line with health authority guidelines.

How can I book an appointment at Define Clinic?

Booking an appointment is easy. You can contact us directly by phone or use the online form below to schedule a consultation or treatment at our Mayfair clinic.

Things To Do

After your visit to Define Clinic, take some time to enjoy the attractions nearby. Stroll through the beautiful Grosvenor Square, explore the high-end boutiques on Bond Street, or indulge in a fine meal at one of Mayfair’s renowned dining establishments.

Define Clinic Beaconsfield waiting room

Get In Touch

Ready to start your journey with Define Clinic? Fill out our contact form, and a member of our aesthetic clinic Mayfair team will reach out to schedule your consultation or answer any questions you may have.