The Doctorate in Professional Studies by Public Works at Middlesex seems to fit your description. Although it is a professional doctorate not PhD. The following paper outlines its features.
Armsby, P. (2012) Accreditation of experiential learning at doctoral level. Special Issue on Learning through Experience: Developing Synergies between Research and Practice in Workplace Learning, Work-based Learning and the Recognition of Prior Learning in the Journal of Workplace Learning. 24(2) 133-150
Best wishes. Pauline
University of Westminster