Thanks again to everyone for the help.
Just to clarify I dont need a case, I am going to reuse my P180

My basket at Overclockers UK:
- 1 x MSI B350M Pro-VDH AMD B350 (Socket AM4) DDR4 Micro-ATX Motherboard= £71.99
- 1 x AMD Ryzen 5 Six Core 1600 3.60GHz (Socket AM4) Processor - Retail= £179.99
- 1 x GeIL Evo X AMD Edition 8GB (4GBx2) PC4-24000 3000MHz Dual Channel Kit - Black (GAEXY48GB3000C16ADC)= £98.99
- 1 x Cougar STX 550W 80 Plus 230V EU Power Supply - Black= £29.99
- 1 x Hynix SL308 120GB 2.5" SATA 6Gb/s Solid State Hard Drive (HFS120G32TND-N1A0A)= £49.99
- 1 x Toshiba P300 3TB 7200RPM 64MB Cache High Performance Hard Drive (HDWD105UZSVA)= £71.99
- 1 x Sapphire Radeon RX 580 Pulse 8192MB GDDR5 PCI-Express Graphics Card= £248.99
Total: £763.03 (includes shipping: £11.10)