This is, as far as I am concerned, the best show in town. Sonny is a truly fine professional. Always willing to find solutions to any problem and nothing is ever too much. He provides advice but respects personal preferences, whenever they emerge. He has a good eye for what works and what doesn't for a given individual and body shape. He has tremendous knowledge of materials, styles, and what needs to be done to achieve the client's objectives. I had my first suit done here recently and will continue to buy suits from Grant & O'Sullivan for many years to come. Highly recommended to anyone with a fine taste and a requirement for the best of the best, yet at prices that are not extortionate. Less

Amazing experience, outstanding service and just the best suit. Can highly recommend Grant & O'Sullivan. Super cute shop in London, Sonny is giving the best advice for the perfect suit and my husband just had the best wedding feeling great in his outfit. Less

Sonny made a beautiful suit for me to wear to my wedding. It was my first time going to a proper tailor to get an bespoke suit, What initially felt like a daunting task was very quickly made to be an amazing experience, Sonny sat with me and my partner and talked us through the suit creation, helped us pick the different options required and we ended up having a really nice time chatting and laughing together throughout that initial meeting. The entire experience from start to finish was really pleasant, the quality of the suit is top notch and will definitely come back for more clothes from Sonny Highly recommend Grant O'Sullivan to anyone looking for a tailor. Less

Great establishment, i managed to secure a jacket an hour before an event saving me the pain from getting a tux delivered. Service was impeccable and the owner was incredibly helpful. Less

Sonny was fantastic from start to finish. I wanted a made to measure suit and was delighted with the amount of design choice this still left (even though it wasn’t ‘bespoke’) as I got to choose fabric, lining, personalisation, buttons, seams, lapels, pockets, pocket angles … Sonny was great at allowing me to choose what I wanted while giving advice as to what he felt worked. The suit fits wonderfully and I’m so pleased with the result. I’ll be back for another one soon and a shirt I suspect … Less

Sonny was brilliant with us. My husband has lost a lot of weight and Sonny ensured that the suit, the jacket, a few pairs of shorts and some trousers got fitted to Perfection. And we were treated very elegantly. Great old fashioned service It was a pleasure doing business with Sonny at Grant and O’Sullivan. We highly recommend them Thank you, Sonny Less