Improved over above:
PCPartPicker part list:
https://uk.pcpartpicker.com/list/dct7HN
Price breakdown by merchant: https://uk.pcpartpicker.com/list/dct7HN/by_merchant/
CPU: Intel Core i5-6400 2.7GHz Quad-Core Processor (£161.94 @ Aria PC)
Motherboard: MSI H110M PRO-VD PLUS Micro ATX LGA1151 Motherboard (£42.30 @ Novatech)
Memory: Crucial 8GB (1 x 8GB) DDR4-2133 Memory (£50.38 @ CCL Computers)
Storage: Kingston SSDNow KC300 180GB 2.5" Solid State Drive (£86.26 @ Amazon UK)
Video Card: Asus Radeon RX 470 4GB STRIX Video Card (£149.94 @ Aria PC)
Case: Thermaltake Versa H15 MicroATX Mid Tower Case (£31.89 @ Ebuyer)
Power Supply: EVGA 430W 80+ Certified ATX Power Supply (£32.88 @ Aria PC)
Total: £555.59
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-09 23:23 BST+0100
Got cheaper mobo, cheaper RAM, and replaced with HDD with a much faster, but smaller SSD. PSU replaced with a much cheaper lower-end model (But still good quality don't worry).