With the help of @KimonSh and the Lido DAO community, losses have been calculated to be 15.15ETH. We have pledged to repay this in full, to cover the losses to stakers. This will be done in 3 equal monthly instalments, to the Lido Execution Layer Rewards Vault. We will update the forum with the transaction details.
The Lido community and client teams have - as always - been incredible with support and offers of assistance while our Data Center infrastructure was being restored.