Thanks for the extra tunes you've been able to ID, I'll let you know if I can find any more.
I've found these two:
Grooverider / Andy C
You were right about this being by Danny C, it’s:
B2) Twisted Anger Feat. Danny C – Say Yeah [Dread – The Cracked Planet EP]
Grooverider / Adam F
A6) Alpha Omega – Feedback [Invader]
(Grooverider played it at Best Of British, ‘The Jubilee Jam’ the week before he played at Code, maybe this was where you had heard it before?) https://www.mixesdb.com/w/2002-06-02_-_Grooverider_@_Best_Of_British_-_The_Jubilee_Jam,_Rex_Music_Arena,_London