In the first report I have seen of BA responding to claims resulting from the IT breakdown, it appears that BA is preparing to reject claims. Claims that they solicited in their post-event emails.
BA have never disclosed what actually happened, but their staff were open in admitting it was their IT problem when I spoke with them near the start of the problem about my flight to Bulgaria.
BA has already refused to credit missed flights with Tier Points and Avios.
I fear that this will do serious reputation damage to BA, as they were certainly inferring they would settle up this time.