- Whitehat tells us why you need responsive web design. Responsive Web design allows you to extend your brand reach, recognition, engagement and customer loyalty beginning today. Our incredible team looks forward to helping you. For further information call us at: 020 8834 4795 br or Visit: br WhiteHat SEO Ltd br 80A Uxbridge Road, Shepherds Bush br London, Greater London W12 8LR br United Kingdom br 020 8834 4795 br info@whitehat-seo.co.