Always used to pick up nice little British label things at various locations in London in the early 80s - Rock On in Camden was good, Camden market and a cracking little record shop on Caledonian Road. My best haul though was from one of the girlie Mods who used to come to the High Wycombe nights I used to run. She told me a friend of hers had swiped some 45s out of a box in her Dad's attic, apparently the Dad used to be a mobile DJ in the 60s and 70s. Said Mod girlie recognised some of the titles from going to soul nights. She lived round the corner from where I worked, so I called round. Stone me! All UK demos, including Tamla Motown red & whites, Garnet Mimms "Looking For You" and so on. Gave her £25 for about 20 of these 45s. Tried to get her to get hold of more but her friend was scared the old man would find out. I know I shouldn't really have taken part in this on ethical grounds, but....well, as they say, needs must!!
I never did manage to find out who these records came from and I have often wondered what other gems were lurking in that mystery box and what has happened to them since.