WRRR clauses in contracts require suppliers operating freight vehicles to demonstrate that their:
We have implemented an organisation-wide initiative to ensure that all businesses working for or on behalf of TfL take measures to improve the safety of their vehicles. It's now mandatory, under all new and existing contracts, for contractors and their sub-contractors who deliver to TfL premises or sites to adopt these WRRR cycle safety requirements.
Failure to meet these requirements could mean vehicles are turned away from sites. It could be considered a breach of contract, resulting in the contract being terminated.
Other organisations - from small developers to large-scale projects such as Crossrail - have also introduced, or plan to introduce, some or all of these contractual requirements. Check with the appropriate organisation for their exact requirements.
Guidance on how to improve safety is available on the FORS website.