Transition to the new Regs
For guidance on transitioning from PCR2015 to PA23 you can refer to the Government’s Transitional and Saving Arrangements Document.
Procurements commenced under the Public Contracts Regulations 2015 must continue to be procured and managed under that legislation. This means any procurements that have started prior to the effective date of the new legislation (currently 24 February 2025). A procurement is commenced when a Contract Notice has been published prior to the effective date of the new legislation.
Resulting contracts or contracts already awarded under the PCR2015 should continue to be managed (including modification and termination) under that legislation. Further details of how long the legislation should be relied on can be found under paragraphs 6 & 7 of the Government's Transitional and Saving Arrangements Document.
Cabinet Office Transition Guidance
The Government has provided this Transforming Public Procurement (TPP) Pre-implementation guidance from their TPP website
Preparing for the new regulations
Procurement Act Notices
Notices need to be published at various stages of the procurement process.
Further information on the notices can be found in this transparency notices publication flowchart.