thank you both for the feedback currently i have been able to find a couple parts without a case yet for around about £370-380 such as an:
Intel Core i3-9100F 3.6 GHz Quad-Core Processor
for £87.18
ARCTIC Freezer 7 Pro Rev.2 45 CFM Fluid Dynamic Bearing CPU Cooler for
£22.99
Gigabyte B365M DS3H Micro ATX LGA1151 Motherboard for
£74.98
Seagate Barracuda 1 TB 3.5" 7200RPM Internal Hard Drive for
£32.99
MSI GeForce GT 1030 2 GB 2GH LP OC Video Card for
£90.86
CoolMax 300 W Micro ATX Power Supply for
£28.73
and a
Patriot Viper 4 Blackout 8 GB (2 x 4 GB) DDR4-3000 Memory for
£32.99
i hope these parts are decent enough for the games i want to run most of which are old games such as cod black ops 1-2 and halo3 maybe rocket league and kinda low demanding games such as those