Blood tests Our Phlebotomists are trained to take blood samples for tests. The Phlebotomy department at the Royal Surrey is based at the back of Outpatients 4 on Level Two of the hospital. Our walk-in service is open from 08.30am – 4.30pm, Monday to Friday for patients with a phlebotomy referral form. Please note that the last time for a blood test is 4.15pm. Children For children up to the age of 10 years, you will be referred to the children’s unit who will ring you to make a scheduled appointment.