The Database of Winterers was originally compiled by Keith Holmes, mainly from publicly available information held by the BAS Archives Service, with corrections from fellow FIDs. It continues to be updated on an annual basis from Winterers lists held by the Archives. The database records the names, occupation, year and base of over 2500 men and women who have spent at least one winter South at British Antarctic bases from 1944 to present – a total of over 4000 FID-years.