I've just gone through the website, and as far as I can see, these are the supporting documents that must be brought to the visa appointment: Appointment confirmation Application itself (the GWF one) CAS TB test if applicable Is that all that is needed or am I missing out on something? Also, if I'm ...

It appears there are two websites we can use to make the application: https://visas-immigration.service.gov.uk/ and https://www.visa4uk.fco.gov.uk/home/welcome

Is there a 'correct' one to use?

I'm applying from Malaysia.