Contact Details The Harlequins Foundation is based at the home of the Harlequins at The Stoop. Our contact details are below. Head Office Harlequins Foundation Langhorn Drive Twickenham Middlesex TW2 7SX Telephone 020 8410 6000 Email foundation@nullquins.co.uk Contact Form Contact Us Name * First Last * Last Email * Subject * Message * reCAPTCHA If you are human, leave this field blank. Submit