This accident happened 2 months ago.
BA knows what happened.
The CAA will have been informed what happened. Given that the regulatory authority is required to give an initial report after 30 days I am surprised that nothing has been published yet.
ICAO Annex 13, Section 7.4
One might assume 7.4 has been complied with by the SA CAA... at no point is it required that such a "Preliminary Report" is made public. I am not sure I have ever seen such a "Prelim Report"? There are other reports in advance of the final, but this Prelim seems a special, limited, case?