I emailed the guy who put these out, just to see what happened. If his story holds true, the original audiovoyeur/lucky sod who caught these lived below the girl, who never closed her windows when the weather was decent. I've lived in the W6 area - there's a lot of conversion style flats with bugger all in the way of soundproofing, and plenty of residential dwellings near enough to the tube lines. If its faked, its a job well done, cos this Londoner believes it.
Cheers for sharing RP, this is an absolutely awesome find!!