How about this:
PCPartPicker part list:
http://uk.pcpartpicker.com/p/1xeLI
Price breakdown by merchant: http://uk.pcpartpicker.com/p/1xeLI/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/1xeLI/benchmarks/
CPU: Intel Core i3-3220 3.3GHz Dual-Core Processor (£73.19 @ Aria PC)
Motherboard: MSI B75A-G43 ATX LGA1155 Motherboard (£55.00 @ Ebuyer)
Memory: GeIL Enhance CORSA 8GB (2 x 4GB) DDR3-1600 Memory (£40.99 @ Amazon UK)
Storage: Plextor M5S Series 128GB 2.5" Solid State Disk (£74.54 @ Scan.co.uk)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£46.99 @ CCL Computers)
Case: BitFenix Merc Beta (Black) ATX Mid Tower Case (£32.90 @ Amazon UK)
Power Supply: XFX 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£34.99 @ Maplin Electronics)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£12.86 @ Amazon UK)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£69.96 @ CCL Computers)
Monitor: Asus ML239H 23.0" Monitor (£148.40 @ Dabs)
Other: 2GB GTX650 Ti Boost (£110.00)
Total: £699.82
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-08-28 17:06 BST+0100)
No peripherals there but you can choose some cheap ones