Any Fellow or member of the Society may make a nomination, and Research Groups are welcome to support nominations. A full list of medals and awards can be found here. The deadline for nomination is the end of February.
Full details and nomination forms at: http://www.rgs.org/AboutUs/Medals+and+awards/Medals+and+awards.htm
Nominations should consist of a completed nomination form with a statement of 200-300 words outlining why the candidate should receive the award, a CV of the candidate and written support of approximately 200-300 words from two additional Fellows or members of the Society (ideally from different institutions/departments). Membership numbers of the proposer and supporters should be included in all correspondence.