WorldPay are NOT PCI DSS compliant!!
"The Royal Bank of Scotland Group (RBS) takes data security and compliance with its many legal and regulatory obligations extremely seriously. The WorldPay payment systems are located in RBS Data Centres that comply with the stringent policies and procedures of RBS and have been designed to the highest standards that the Bank’s regulators and legislators expect.
As you may be aware, WorldPay has been involved in a major project to replace the existing system and migrate to a new and enhanced platform. As part of this project, all work necessary to comply with the PCI DSS rules is therefore being directed at the new system and as a result WorldPay will remain 'In Progress' for PCI DSS compliance until work on the new system and migration of customers is complete.
RBS maintains in regular and open dialogue with both VISA and MasterCard, sharing progress reports and updating plans, ensuring, as the enforcers of Scheme regulations, that they are up to date and aware of the project’s developing position towards compliance and endorsing of our plans."