We could have a long debate on this! Potentially yes, as the requirement is for the antibody screen to be valid for 72hrs.
Though I must admit to having concern about some category of patients, particularly SCD with allo-antibodies, and who could be more sensitive to forming additional weird and wonderful antibodies in a short time, though I am sure the BSH writing groups would have looked into these scenarios.
Why not give the BSH writing group members a call as I believe they are in the process of updating these guidelines?