Monitor:
Samsung S24B300HL 23.6 inch Widescreen LED Monitor
£99.00 (£118.99 w/ £20.00 rebate)
[http://www.amazon.co.uk/Samsung-S24B300HL-23-6-inch-Widescreen/dp/B0077L2LAC/ref=pd_cp_computers_0]

CPU:
Intel Sandybridge i5-2500K
£167.00
[http://www.amazon.co.uk/dp/B004FA8NX2]

Cooler:
Cooler Master Hyper 212 Evo
£25.90
[http://www.amazon.co.uk/exec/obidos/ASIN/b0068oi7t8/geizhals07-21]

Case:
NZXT M59 Black Mid Tower
£50.01
[http://www.ebuyer.com/173550-nzxt-m59-black-mid-tower-case-no-psu-nzxtm59001bk]

Motherboard:
MSI Z77A-G45
£80.00
[http://www.novatech.co.uk/products/components/motherboards/intel1155z77chipsetmotherboards/MSI/Z77A-G45.html]

Ram:
Corsair CML8GX3M2A1600C9B LP 8GB
£35.00
[http://www.amazon.co.uk/Corsair-CML8GX3M2A1600C9B-Vengeance-Memory-1600MHz/dp/B0058J1Q7O/]

OS:
Microsoft Windows 7 Professional
£50.00
[http://www.software4students.co.uk/products/microsoft-windows-7-professional-upgrade]

Hard drive:
Seagate Barracuda 7200.12 / Western Digital 1TB Blue
£65.00
[http://www.dabs.com/products/western-digital-1tb-blue-sata-6gb-s-7200rpm-64mb-3-5--hard-drive-8757.html]

PSU:
OCZ ModXStream Pro 600W
£58.57
[http://www.amazon.co.uk/dp/B001GLFD54]

Mouse:
Gigabyte M6800
£8.00
[http://www.amazon.co.uk/dp/B001BZD6X6/]

Keyboard:
Logitech K360 Wireless Keyboard
£20.00
[http://www.amazon.co.uk/Logitech-K360-Wireless-Keyboard-Black/dp/B0055JDM06]

Speakers:
Logitech Z120
£12.00
[http://www.amazon.co.uk/Logitech-980-000513-Z120-Stereo-Speakers/dp/B00544XKK4/]

GPU:
XFX ATI RADEON 6870 1GB Dual Fan
£120.00
[http://www.amazon.co.uk/gp/product/B005QB65NE/]

Wifi Card:
TP-Link 150Mbps Wireless PCIe Adapter
£10.00
[http://www.amazon.co.uk/exec/obidos/ASIN/b0036afaew/geizhals07-21/]

Optical Drive:
LG 24x SATA Bare Internal DVD Rewriter
£14.00
[http://www.amazon.co.uk/LG-GH24NS90-AUAA50B-SATA-Internal-Rewriter/dp/B007267YRC/]