That case is still pretty big, how about this
PCPartPicker Part List
Type
Item
Price
CPU
AMD - Ryzen 5 3600 3.6 GHz 6-Core Processor
£188.99 @ Amazon UK
CPU Cooler
Alpenföhn - BLACK RIDGE 47.1 CFM CPU Cooler
£48.60 @ More Computers
Motherboard
MSI - B450I GAMING PLUS AC Mini ITX AM4 Motherboard
£109.97 @ Laptops Direct
Memory
Corsair - Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 Memory
£76.37 @ CCL Computers
Storage
Western Digital - Blue 500 GB M.2-2280 Solid State Drive
£51.99 @ Amazon UK
Video Card
Gigabyte - GeForce RTX 2060 6 GB WINDFORCE OC Video Card
£329.99 @ CCL Computers
Case
Silverstone - SG13 Mini ITX Tower Case
£39.95 @ Amazon UK
Power Supply
SeaSonic - FOCUS SGX 650 W 80+ Gold Certified Fully Modular SFX Power Supply
£100.47 @ Scan.co.uk
Case Fan
Noctua - NF-A12x15 PWM 55.44 CFM 120 mm Fan
£18.43 @ Amazon UK
Prices include shipping, taxes, rebates, and discounts
Total
£964.76
Generated by PCPartPicker 2019-07-11 19:20 BST+0100
Sfx for easier cable routing