Boohoo outlines a lot of the steps it has taken since the Levitt Report (p. 7,8). It doesn't explicitly claim these are in response to modern slavery but they outline they have taken significant steps since their last MSA report, which have been implicitly triggered by the Levitt Report.

Third party experts carry out an independent assessment of performance against our

standards and our internal teams will work with suppliers to drive improvements

through corrective action plans. (p.7, aug, 2021)

We then collected evidence on how the standards had been

implemented which included assessments as part of the 3rd party

auditing programme and followed up with corrective action plans. (p.10, feb 2021)