Well, a year's nearly up and i've never managed to find out what this track is....
It's the last tune on the Ronski Speed set from the Tranceairwaves Presents: Transcend 2 broadcast back on January 18th 2004

01. John B. ft. Libby Picken – Electrofreek! (John B. Trance Mix/Ronski Speed Edit)
02. Oceanlab ft. Justine Suissa – Sattelite (Markus Schulz Coldharbour Remix) [Euphonic]
03. Andy Hunter – Go ! (Antillas Remix) [Nettwerk UK]
04. LNG – Inter City (Original) [Tsunami]
05. Miro – By Your Side (Ronski Speed Mix) [Euphonic]
06. Ronski Speed pres. Sun Decade – Follow You (Extended Vocal Mix) [Euphonic]
07. Armin Van Buuren ft. Justine Suissa – Burned With Desire (Ronski Speed Mix) [Euphonic]
08. Modulation – Spirits (Slusnik Luna Mix/Kyau vs. Albert Rework)
09. St. John vs. Locust – Mind Cirles (Original) [Armada]
10. Sonicvibe & Mike Shiver – Lunation (Original) [Captured Music]
11. Kyau vs. Albert – Velvet Morning (Aalto Remix) [Euphonic]
12. Agnelli & Nelson pres. Ultra – Holding Onto Nothing (Club Mix) [Xtravaganza]
13. ??????

Both the official Ronski Speed site and the tracklist archive from this forum fail to mention the track which came after #12 (Agnelli & Nelson) but this mystery tune is clearly mixed (to my ears) into 'Holding On' and therefore should be included as part of this set!

It could be a well known track or one released since Jan of last year but i've never stumbled upon it at all!
Hopefully someone will put me out of my misery....

Oh, by the way, it's a goddamn TUNE!!