It doesn't have to be really powerful, but the more modern the CPU and graphics card the more capable for the same power as something a while ago.
Besides... a basic desktop will typically outperform most laptops because laptops will throttle components when they get hot and there's no great thermal solution for laptops.
If you can stretch and want a lot of bang for buck (in CPU and GPU) then at £750 this is pretty solid https://ao.com/product/9s6b92811070-msi-desktop-black-70314-253.aspx and would offer a cheaper upgrade path in the future if that's your thing (MSI make components, so this is filled with their bits and by their nature are commodity things that can be changed around).
I would also suggest something a lot more recent.
It doesn't have to be really powerful, but the more modern the CPU and graphics card the more capable for the same power as something a while ago.
Besides... a basic desktop will typically outperform most laptops because laptops will throttle components when they get hot and there's no great thermal solution for laptops.
A quick look on Overclockers UK for things up to £650 for the desktop itself (assumes you have a monitor, keyboard and mouse)... https://www.overclockers.co.uk/pc-systems/gaming-pc?ckMin=44999&ckMax=65000&ckTab=0&sSort=2
But weirdly, you can get better deals from non-obvious places... ao.com even :D
https://ao.com/l/desktops-gaming_tower/1-166/250-253/?sort=aol_saleincvat
Delivery from tomorrow https://ao.com/product/3xs102171-3xs-desktop-black-72282-253.aspx it's brand new... not stunningly good, but it would outperform your laptop.
If you can stretch and want a lot of bang for buck (in CPU and GPU) then at £750 this is pretty solid https://ao.com/product/9s6b92811070-msi-desktop-black-70314-253.aspx and would offer a cheaper upgrade path in the future if that's your thing (MSI make components, so this is filled with their bits and by their nature are commodity things that can be changed around).