I believe I've already tried that @Technogeezer but I gave it another go and unfortunately it's still didn't make any difference. Still incredibly slow. This is getting beyond frustrating. If the issue is with Hyper-V then I think @wila could be right and it's hard to fully disable it now, but it seems like just another issue that VMWare needs to resolve.
It's absolutely crazy that at the moment, I can't run a basic Linux VM on a well spec'd new laptop.