Building a new PC with some old parts.

[alekspavlov2208]

https://gyazo.com/76a016322eaa014ff6b1ecef10f654c1

So these are the parts I'm looking to buy.
I haven't included RAM and a graphics card since I already can get those parts from my current build.I just want to know if I've chosen the right parts before I actually buy anything for example I can pick a different CPU or Motherboard if anyone recommends anything better.I can spend up to £500.Thanks in advance to anyone that replies.

Additional Info:
The parts in the picture average out to £455.
My current GPU: 1050 Ti
My current RAM: 2x8GB DDR4

Edit:
If anyone else has any other suggestions please put them down below .

 

[ArchitSahu]

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Wasting money. 6600k on a B250? Unlocked CPU on the locked mobo is not the right way.

For 500 pounds get this:
PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i5-8400 2.8GHz 6-Core Processor (£150.37 @ Aria PC)
Motherboard: MSI - Z370 PC PRO ATX LGA1151 Motherboard (£108.99 @ Box Limited)
Storage: Team - L5 LITE 3D 240GB 2.5" Solid State Drive (£40.99 @ Overclockers.co.uk)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£34.74 @ Aria PC)
Case: NZXT - S340 (Black) ATX Mid Tower Case (£55.79 @ Aria PC)
Power Supply: SeaSonic - FOCUS Plus Gold 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£79.99 @ Amazon UK)
Total: £470.87
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-07-16 11:10 BST+0100

Z370 mobo to allow for upgrades down the road. SSD and HDD included.

OR

Ryzen:
PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 2600 3.4GHz 6-Core Processor (£163.97 @ Amazon UK)
Motherboard: MSI - X470 GAMING PLUS ATX AM4 Motherboard (£119.98 @ Amazon UK)
Storage: Team - L5 LITE 3D 240GB 2.5" Solid State Drive (£40.99 @ Overclockers.co.uk)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£34.74 @ Aria PC)
Case: NZXT - S340 (Black) ATX Mid Tower Case (£55.79 @ Aria PC)
Power Supply: SeaSonic - FOCUS Plus Gold 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£79.99 @ Amazon UK)
Total: £495.46
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-07-16 11:11 BST+0100

2600 can be overclocked to match a 2600x.

Rest all is same.