The Wellcome Trust under the chairmanship of Sir William Castell, 2015. Relief sculpture and engraved lettering by Bret Syfert, 2015.

On one side, activities of the Wellcome Trust during Sir William Castell's chairmanship: DNA (representing the Wellcome Trust Sanger Institute and the Francis Crick Institute); a mosquito (the campaign against malaria), the unicorn (logo of the Wellcome Foundation Ltd); the globe, showing Asia and Africa (reflecting the international work of the Trust); a portrait of Henry S. Wellcome (founder of the Wellcome Foundation, Wellcome Trust and Wellcome Library); the portico of the Wellcome Building in London (where Wellcome's library and museum collections are made availabe to the public); and the logo of Project Enthuse (a radial form representing continuing professional development of science teachers and technicians). On the other side, a calligraphic inscription of the names of the chairmen of the Wellcome Trust 1936-2015