ThatGuyNamedSteven :
People are saying i should change the i7 7700k to just a i7 7700 because i don't plan on overclocking and to not get a liquid cooler. They are also saying i should get a cheaper motherboard but with the cheaper motherboards i have looked at they don't say anything about vr so i think if they actually mention vr it's better. I am also contemplating to changing to a 1080 ti but it all depends. As well will corsair vengeance lpx 16gb ram rather than the above one make much difference?
There's a little more than difference between them than just overclocking. the 7700k has a base frequency of 4.2 and the 7700 is 3.6. And imho that extra few bucks is worth the jump.
You could save a good chunk by going with an air cooler like the Cryorig H7 which is only bit over 1/3 of the cost of that liquid cooler.
The only difference you will see between the Gskill and the Corsair is in you walled(the Corsair currently costs more), performance wise they will be the same if spec'd the same.
I modified your build a bit. Used a different motherboard and cheaper cpu cooler and used some of the savings for a faster NVME M.2 SSD.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel - Core i7-7700K 4.2GHz Quad-Core Processor (£299.94 @ Aria PC)
CPU Cooler: CRYORIG - H7 49.0 CFM CPU Cooler (£38.10 @ CCL Computers)
Motherboard: Asus - PRIME Z270-P ATX LGA1151 Motherboard (£106.19 @ Aria PC)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory (£97.50 @ Aria PC)
Storage: Western Digital - Black PCIe 256GB M.2-2280 Solid State Drive (£107.32 @ More Computers)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Video Card: Asus - GeForce GTX 1080 8GB ROG STRIX Video Card (£524.00 @ Ebuyer)
Case: NZXT - S340 Elite (Black) ATX Mid Tower Case (£79.33 @ CCL Computers)
Power Supply: EVGA - SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£83.58 @ Amazon UK)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£80.52 @ CCL Computers)
Wireless Network Adapter: Gigabyte - GC-WB867D-I PCI-Express x1 802.11a/b/g/n/ac Wi-Fi Adapter (£26.95 @ Amazon UK)
Total: £1485.41
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-11 20:25 BST+0100
Now if you are wanting to try and fit a GTX 1080ti into the original budget I could give it a shot. BTW what resolution are you planning on playing? Will you be using the system for other taxing tasks besides gaming?