BPL had plans to move to a pool size of 250 litres (thus some 1,250 donations). Linked evidence SBTS0000284_085 - Notes on a scheme to increase the preparation of Factor VIII Concentrate from 200 to 1000 litres of Plasma - 01 Jun 1973 Chronology Information Date: 1 June 1973 Chapter/issue Blood Products and Addressing Risk: Pool Sizes