HECToR is the UK's new high-end computing resource, funded by the Research Councils and available for researchers at UK universities. The first Phase of HECToR (High-End Computing Terascale Resource) was opened in October, 2007. It is a Cray XT4-based system with a peak performance of around 60 Tflops, and it is located at the University of Edinburgh's Advanced Computing Facility (ACF). The next stage of the project, planned for October 2009, will take the peak performance up to 250 Tflops. A third phase is planned for 2011.