PCPartPicker part list:
http://uk.pcpartpicker.com/p/tPNpRB
Price breakdown by merchant: http://uk.pcpartpicker.com/p/tPNpRB/by_merchant/
CPU: Intel Core i5-4440 3.1GHz Quad-Core Processor (£131.20 @ Aria PC)
Motherboard: Gigabyte GA-H81M-D2V Micro ATX LGA1150 Motherboard (£38.00 @ Aria PC)
Memory: Patriot Signature 8GB (2 x 4GB) DDR3-1600 Memory (£43.45 @ Amazon UK)
Storage: Kingston SSDNow V300 Series 120GB 2.5" Solid State Drive (£41.98 @ CCL Computers)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£35.94 @ Aria PC)
Video Card: MSI Radeon R9 280X 3GB TWIN FROZR Video Card (£179.14 @ Scan.co.uk)
Case: Corsair 200R ATX Mid Tower Case (£43.48 @ Aria PC)
Power Supply: XFX 550W 80+ Bronze Certified ATX...