I doubt that milk banks in UK use drip milk anymore either,  these studies
were mostly done in the early 80s.  If I had my druthers we'd use "top"
milk to enrich the breast milk or make dry human milk solids to add from
extra breast milk - not other sources.  I thought I remembered reading that
pooled mother's milk from milk bank isn't as nutritious as own mother's
milk?  Anyone else remember that factoid?  Sincerely, Pat in SNJ