Background/Aims A long-standing issue common to most emergency departments worldwide is overcrowding, and the UK is no exception. Overcrowding can have many adverse consequences, such as increased medical errors, decreased quality of care and poor patient outcomes. This service evaluation aimed to review the number of patients referred to acute specialties by their GPs and to evaluate the impact of these referrals on the flow of patients in and out of the emergency department and acute medicine. Methods GP referral letters were collected at an emergency department in Greater Manchester, England, between 15 May 2019 and 28 May 2019. A proforma was used by a consultant in acute medicine and a consultant in emergency medicine to evaluate each letter. Result A total of 139 GP referrals were received by the emergency department, of which 43 were to general medicine and 96 to other specialties. Of the latter, 54 cases were directed to the emergency department, 20 were directed to a different specialty and 23 did not have a specialty clearly specified. The majority of referrals were for gastrointestinal conditions or abdominal pain, with the next largest category being chest infections. Most of these patients were eventually seen in the trust's ambulatory assessment area to relieve pressure on the emergency department. Conclusions Planned and specific use of urgent care centres and ambulatory assessment areas can help to relieve pressure on emergency departments, but appropriate intervention at the primary care level is also necessary to improve patient flow.