Blench collaborated extensively with the late Professor Kay Williamson, who died in January 2005, and is now a trustee of the Kay Williamson Educational Fund, which exists both to publish the unpublished material left by Kay Williamson and to promote the study of Nigerian languages. A series of publications supported by the trust is under way with Rüdiger Köppe Verlag in Cologne.
Blench has also conducted research and evaluations of international development activities worldwide, as a consultant and formerly as a research fellow of the Overseas Development Institute in London.
David Henry Crozier; R. Blench; Keir Hansford (1992). An index of Nigerian languages. Nigerian Educational Research and Development Council. Language Development Centre, University of Ilorin. Dept. of Linguistics & Nigerian Languages, Summer Institute of Linguistics. Summer Institute of Linguistics. ISBN0-88312-611-7.