Welcome To Leigh Dental Centre – Dentist Southend On Sea. Premium dental care in the heart of Southend On Sea. Address: 790 London Rd, Leigh-on-Sea, Southend-on-Sea, SS9 3NJ Phone Number: 01702 472929 Business Hours: Mon- Tue : 08:15AM - 06:00PM Wed : 08:15AM - 05:00PM Thu : 08:15AM - 06:00PM Fri : 08:15AM - 05:00PM Sat : 09:00AM - 02:00PM