Advisors from the Marshall Fellowship Program suggest checking into the following resources to uncover UK programs.
An interactive map of the UK and links to eligible British Institutions for the Marshall
For a list of courses offered across the UK:
Hobsons Postgrad
To research whether the chosen department or university has a good standing
in any subject, and to determine how they are rated for research across
disciplines:
Research Assessment Exercise (RAE).
For further information about finding a program in the UK, check the individual fellowship’s website for resources and go to Cornell University’s Researching a UK Degree Program.