Percy Lane Oliver, British pioneer of volunteer blood donation (died 1944)

Percy Lane Oliver was a British civil servant, who is credited with founding the first volunteer blood donation service. A layman, Oliver was working for the Camberwell division of the Red Cross in 1921 when he responded to a call from a local hospital requesting an urgent blood donation. This experience led him to organise a panel of donors whose blood types were known and who were available to donate on request. The donors, unusually for the time, were not paid. Oliver's blood donation service, which he ran out of his London home, would grow from 20 volunteers at its inception to approximately 2700 in 1938. His model of voluntary blood donation was adopted throughout Britain and in other countries.

April 11 is the 101st day of the year in the Gregorian calendar; 264 days remain until the end of the year.