Interesting - Having been involved in general aviation (only); I think the jump should never have gone ahead. A case of blind carry-on-itis and serves the Skydiving fraternity very poorly. The light was fading, the cloud was getting lower, and the wind above building level was 30kts+ and 15kts+ on the surface, which would indicate a high level of Shear and turbulence below 50'. Additionally, there are 150' lighting stanchions in each corner of the pitch. Nothing personal but if it was an Air show the Reds display would have been pulled - that’s my two pence worth!