York Minster 1930. Edward Bairstow taking a rehearsal in the Song School in his signature spats (photo: Recorded Church Music Archive) "500 uploads on YouTube!" tweeted the Archive of Recorded Church Music, triumphantly, last week.  Colin Brownlee who runs the archive has been gathering recordings - LPs, 78s, cassettes, reel-to-reel, CDs, commercial and private - for 15 years, and has created a collection of cathedral and church choral music which is now seen as definitive. "I started with my own collection of LPs," he said, "but soon realised there was nowhere to go to find out…