Over company is planning on doing a clinical trial on a medical device. We are in the early stages of the product development and don’t have physical devices to complete the clinical trial. We do however know the concept that we wish to trial and one of the options that we are considering is producing devices using commercially available components and accessories, testing them in our lab and routing them for sterilisation prior to conduction the trial. These clinical trial devices will not be visually or physically comparable to the finished device that we are designing, we are using them solely to prove out the clinical concept. Is this a legitimate approach and will it be accepted by the Competent Authority and Ethics Committee. Appreciate any guidance that you can provide.