There is not a a specific remediation process: however, there is a development guideline.
pg. 5
"We do not have a specific remediation process for Modern Slavery at this stage. We will follow the intent in our Supplier Code of Conduct to work collaboratively with suppliers to help them develop
their capability to meet our expectations. Suppliers who cannot demonstrate progress towards conformity with these expectations will be viewed less favourably in future contract negotiations."
The company states that they had a security services supplier who could not pay a living wage, so they stopped working with them and hired a new security services company who could pay a living wage. Hence, it is considered as 'cancel contract'.
pg. 4
"The modern slavery review process has helped us review wage payment levels. At contract renewal we recognised that one of our physical security service providers was not paying a wage comparable to the Living Wage to the guards assigned to our site. The company could not commit to paying the Living Wage and did not have the mechanisms to do so for the next contract term. We subsequently returned to review the market for these services and appointed a new service provider who could achieve this and provide evidence to validate this."