Mystery tune identified, 21 years later!
The track that starts here at 9.43 with MC OC riding...
And also (with different, nearly as excellent, MC - Det? - riding) here at 31.05:
Ment 4 Bass = DJ Phantasy + DJ Lee. Engineer: Alex Reece.
Another incredible track by Phantasy:
And this one done with Gemini:
This one too
And - I never knew this - Phantasy was half of DJ's Unite, as on the original Energy Flash CD