Gorillaz fan beatfloh was there and writes: "the orchestra conducted by Andre performed a longer version of the first part from Electric shock and a second one I haven't heard before. The songs were called New Commission 1 and 2. Damon was there."
Damon has previously spoken of working with the Midlands-based orchestra on material possibly for the new Gorillaz album, as reported on Gorillaz-Unofficial at the time here.
Another version of 'Electric Shock' was performed at the Africa Express Koko gig on 28 October 2008. You can hear that on Youtube here.