Excellent and reliable PSU available from Amazon UK, a good deal cheaper than Scan who are currently retailing it at £159.98.
850 W of reliable, continuous power
80 Plus Platinum certified guarantees 92% efficiency and silent operation
Flat black, low-profile modular cables
High performance design, designed for use in truly remarkable PCs
Guaranteed to deliver clean, stable, continuous power even at a server grade 50 degrees Celsius ambient temperature. 10 years warranty