When completing your application, you'll usually need to fill in all sections, including a personal statement and a reference, unless a university has specifically told you that you can apply without them.
Remember, once you have submitted your application, you can't go back and add a personal statement or reference, or make changes to these, so if you're not sure, it's best to have them ready.
Once your application has been fully and completely submitted, you'll then be able to contact the universities and colleges you’re interested in with your Personal ID and Clearing number to see if they can offer you a place.
Top tip: Speak to as many universities and colleges as you like, but only add a Clearing choice directly in your UCAS Hub to accept the one you want, once you have their permission.