Société Générale will be severely criticised in an independent report into the €50bn ($77bn) rogue trading scandal at France’s second-biggest bank, to be published within the next two weeks.

The final report commissioned by three of the bank’s non-executive directors, chaired by Jean-Martin Folz, former boss of Peugeot, is expected to be harsher than the interim findings published in February, a month after the scandal broke.