@SHbickel When the Wilsons family split, Wilson’s of Sharrow stopped in what became known as the bottom mill, and JH Wilson set up their mill at the top of Sharrow Vale Road, and it became known as the top mill. The top mill is now kaput, and seems to have been leased off as offices and small workshops or suchlike, but the bottom mill is still there and functioning. You could easilly see one mill from the other (though there are some flats/apartments in the way now), and they’re very close as the crow flies. It looks like there was at one stage a passage from the Sharrow Mill (sited on Snuff Mill Lane) onto a narrow passageway which leads to Sharrow Vale Road, but that’s shut off now, so it’s quite a hike to get from one site to the other. Yes, I’m from Sheffield. So Top Mill refers to JHW (and SG’s Top Mill is just a homage, not any reference to a different milling process), and Bottom Mill refers to WoS. This “new” SP1, must refer to one of their earliest recipes I’m guessing.