 As per the National Institute of Clinical Excellence NICE guidelines the best prostheses demonstrates a revision rate the rate at which they need to be replaced of 10 or less at 10 years. This should be regarded as the current benchmark in the selection of prostheses for primary Total Hip Replacement THR. It is also considered reasonable to recommend a prostheses with a maximum of 3 revision rate at 3 years which would indicate performance would then be subjected to annual review up to 10 years to ensure that the revision rate remains consistent with the 10year benchmark. The Orthopaedic Data Evaluation Panel ODEP was established to evaluate data on the outcomes of prostheses provided by manufactures and to inform the NHS which products are compliant with the benchmarks set by NICE. Therefore this study will be a ODEP compliant multicentre prospective surveillance study of the Furlong Evolution Hip Stem that will assess the clinical, functional and radiographical performance over a 10 year period in compliance with the NICE guidelines. 