The Met Office has been at the cutting edge of supercomputing for several decades. A significant UK Government investment in October 2014 started the next chapter in High Performance Computing at the Met Office culminating in the successful installation of Cray XC40 supercomputers.The Met Office’s supercomputer capability is one of the most powerful and resilient in the world dedicated to weather and climate science. Further details can be found at www.metoffice.gov.uk/research/technology/supercomputer and information on how to participate in our benchmarking process, including the licencing arrangements, can be requested via the eTendering portal at https://procontract.due-north.com/Home/AboutThe Met Office is now seeking to procure new supercomputing services capability to cover the next 5-14 years. This must deliver a substantially enhanced capacity, that is both sustainable and innovative in terms of economic, technical, social, environmental and political considerations.