Disctronics S (Southwater)

Matrix shows DISTRONICS opposite the cat no. Often names the artist. Cat no and other details preceded by a S for Southwater. (but sometimes just DISCTRONICS)

Mastering SID: IFPI L501 to IFPI L510 and Mould SID: IFPI 87xx

Example here: https://coverartarchive.org/release/01401bfe-a346-4933-9461-00fde7dca14f/23351608407.jpg

MusicWeek Magazine, page 4 notes Disctec sold the plant to Disctronics 31 July 1987 for £15m
https://worldradiohistory.com/UK/Music-Week/1987/Music-Week-1987-07-18.pdf