Other companies offering complementary skills and with whom I collaborate on a project by project basis;

Medical Options
Anthony Stevens of Medical Options has many years experience in producing comprehensive reports on the European market for different branches of medical imaging .
http://www.medicaloptions.co.uk/index.html

Holley Projects.
Run by Chris Holley, Holley Projects offers marketing communications including copywriting, case studies and press releases.
http://www.holley-projects.co.uk/