The Royal College of Surgeons of England (RCS) recently issued guidance regarding the use of re-operation rates in the re-validation of UK based orthopaedic surgeons. Currently, little has been published concerning acceptable rates of re-operation following primary surgical management of orthopaedic trauma, particularly with reference to re-validation. We conducted a retrospective review of patients undergoing a clearly defined re-operation following primary surgical management of trauma between 1st January 2010 and 31st December 2011. 3688 patients underwent primary procedures while 83 (2.25%; 99%CI = 1.69 to 2.96%) required an unplanned re-operation. The mean age of patients was 46 years (range 2–98) with 46 (55%) males and a median time to re-operation of 34 days (IQR 12–134). Potentially avoidable re-operations occurred in 47 patients (56.6%; 99%CI = 42.6 to 69.8%) largely due to technical errors (46 patients; 55.4%; 99%CI = 41.4 to 68.7%), representing 1.27% (99%CI = 0.87 to 1.83%) of the total trauma workload. Within RCS guidelines 28 day re-operation rates for hip fractures, wrist fractures and ankle fractures were 1.4% (99%CI = 0.5 to 3.3%), 3.5% (99%CI = 0.8% to 12.1%) and 2.48% (99%CI = 0.7 to 7.6%) respectively. We present novel work that has established baseline re-operation rates for index procedures required for revalidation of orthopaedic surgeons.