This is slightly over your budget but its 980 TI so top tier GPU nothing gets better and since you only want to game not video edit or render the i5 4690k is perfect for you.
PCPartPicker part list:
http://uk.pcpartpicker.com/p/HqX2hM
Price breakdown by merchant: http://uk.pcpartpicker.com/p/HqX2hM/by_merchant/
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor (£177.91 @ Amazon UK)
Motherboard: MSI Z97 PC MATE ATX LGA1150 Motherboard (£64.99 @ Amazon UK)
Memory: Kingston HyperX Fury Red 16GB (2 x 8GB) DDR3-1866 Memory (£60.99 @ Amazon UK)
Storage: Crucial BX200 240GB 2.5" Solid State Drive (£49.99 @ Dabs)
Storage: Western Digital Blue 2TB 3.5" 5400RPM Internal Hard Drive (£53.94 @ Aria PC)
Video Card: Gigabyte GeForce GTX 980 Ti 6GB WINDFORCE 3X Video Card (£491.99 @ Ebuyer)
Case: NZXT S340 (Black) ATX Mid Tower Case (£58.60 @ Aria PC)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply (£51.48 @ Amazon UK)
Total: £1009.89