Hi! I am a King’s College London student that applied from Toronto using the Ontario diploma in 2019.
Back at my high school, everyone who applied to UK universities used UCAS instead of applying directly. On UCAS the student will be able to apply to five universities (including either Oxford OR Cambridge, can’t apply to both) using one personal statement instead of writing different personal statements for each university. There is also only one payment of £25. Overall, the application process is very similar to OUAC except the letter of recommendation written by a teacher or a guidance counselor and personal statement.
As for marks, the student themselves will need to enter their marks on their own on UCAS. I recommend putting down all their marks starting from grade 9, despite the universities really only look at grade 12 predicted marks unless if the student chooses to apply to really competitive universities like Oxbridge, London Universities, St Andrew’s, Edinburgh.... Finally, when the student firms their offer, the university will ask for their final transcript, which the school will need to send to the university unless if the university asks the student to send to them directly.
Also, it’s important to note that some universities also have different entry requirements for Ontario students despite showing the same A-level minimums. For example, UCL’s ABB is 83% while Edinburgh’s is 80%. So it’s definitely a good idea to look at the requirements for each university the student is planning to apply to. As harsh as this is, if they don’t have the minimum, there is no chance that the university will accept them.
Hope this helps! And if you have anymore questions please don’t hesitate to ask!