During summer 2010 we developed an online survey, opened in October 2010, which we advertised to a number of senior researchers in this field around the UK asking them to forward it around their groups.
This survey asked for detailed information about the software usage and authorship practices of researchers, with the aim of obtaining a number of individual case points for further examination as well as some broad numerical results. The survey closed in April 2011, with 54 complete and 23 partially
complete responses. There were responses from at least 16 different institutions.
You can read about this survey and its results here.