Hmmm I don't recall Dignitas being a huge Q3A clan, or even one of the better clans, if they even existed back then. I played for Ironfist at the time with some, if not the top UK players at the time (mist, vorv, bl0key, deus, Q50 (played for 4Kings also) etc)). Then you had clans such as 4Kings, UNR, DC that all had very good players and did really well online and did ok on LAN in Duel, TDM, CTF. But nothing of 100k in terms of winnings.
I remember Hell well and played loads with him around that time in Q3A and before that in Q2 at a high level (both for UK and normal leagues). He won some tourneys and did well in qualifiers such as WCG UK, ESWC, but he never won anything big really, or if he did, nothing of that level. He did well in team sacrifice/2v2 iirc in QC. The only other top UK player in Q3a that attended big LANs was Bl0key and he was probably, if not the best the UK had to offer for duel at the time and he won quite a bit and qualified the most. He won well over 10k, maybe twice or three times that, no doubt. But nothing close to 100k. Garpy never existed really in Q3A as he was still smashing HL but later started QL. I can't think of any other UK player(s) from that era that won huge in Q3A other than I mentioned.