The main objectives of this assessment are the following: To determine the diagnostic performance and clinical utility of automated devices available in UK clinical practice (BlueDop doppler device [BlueDop Medical], boso ABI-system 100 [BOSCH + SOHN], WatchBP Office ABI [Microlife], WatchBP Office Vascular [Microlife]), MESI ABPI MD [MESI], MESI mTABLET ABI (MESI), Dopplex Ability Automatic ABI System [Huntleigh Healthcare]) for assessing the presence of PAD in people with leg ulcers. To develop an economic model to assess the cost-effectiveness of the automated devices available in UK clinical practice for assessing the presence of PAD in people with leg ulcers.