IO540:
There is no need to dig out the record of the Shoreham weather on the day for it is clearly shown in the accident report. I presume therefore that you haven't read it?
The TAF covering the period of the flight was:
080847Z 0800816 VRB03 2000 BR SCT050 TEMPO 0810 0800 FG BKN010 BCMG 1113 7000 NSW