- This second edition reflects the significant growth in quality assurance activity, and an increased willingness to share experience and expertise amongst those involved in the field. The directory covers the 192 DHAs in England, and provides comprehensive data from Scotland, Northern Ireland and Wales. It includes a barchart comparing the percentage uptake of quality assurance tools. Details in the directory given are name of co-ordinator/contact person; address and telephone number; clinical specialty; measurement instrument; project details/recent developments. Index includes QA tools by region; QA tool by specialty/field; and staffing tools.