Nice one Pottel! 
My absolutely favourite instrumental track ever. 
Even though both versions are solid and intense, (secret policemen is closer to the original, but I miss the Max Middleton keyboards and that the bass has to fill in for them)  from many other editions I have heard, I will always prefer the studio recording in Blow by blow.    Because it has to do with precision and the virtuosity is a tool for the beauty of the song, while on these live editions (at least the 2004 one), it seems and feels more like a show case for virtuosity. 
I like this one very much for the musicmanship and some new fine solo licks  : 
And since this song was written by Stevie Wonder, we should not forget the first recording, with also has lyrics, by Syreeta Wright, his ex-wife. Heart felt. 
Angelic voice. Sadly she died almost 10 years ago.