The Veterans’ Advocacy People (VAP) service came about in response to a gap in specialist provision for military veterans and their families, and seeks to provide more intense, specialist support than is available elsewhere. Key to VAP is the fact that it is a peer-delivered advocacy service. Advocates aim to give clients a voice, supporting them to negotiate their next steps, whilst addressing the barriers that are holding them back. The Advocacy People commissioned SERIO to carry out a rigorous and independently verified evaluation of VAP, in order to broaden understanding of military advocacy and any associated benefits. The evaluation will gather a solid and credible evidence base on the impact of advocacy outcomes, and explore the change they can bring about for veterans and their families.