Hi Liam, welcome to the website, do you have any idea where the noises are coming from to narrow it down? does it worsen when you turn the steering wheel? might be an idea to upload a video so we can hear the noise... i'm possibly thinking oil is too thin, and once it warms up could be causing your oil pump to become noisy, or likewise with gearbox oil... only a theory, but will need to hear to sound for my self