Didn't get any responses in 'Further Education'...!

DS, 17, will be doing this Art Foundation 1yr course (UAL) at a local tech in Sept.
He wants to do Graphic Design at Uni, and is aiming high.
He's doing GD A level and a 2 A level equivalent BTEC in digital design tech at 6th form, which he's predicted high grades (A star/ D star/ D star).
'Art' subjects admission to uni is very portfolio dependent, so UCAS points above a certain level are not that important. He probably has them already 
DS wants to effectively stay back a year (not defer- he didn't apply for this year) as he wants to get a great portfolio and a year's maturity, hence the Foundation.
Now, uni interviews are Jan/Feb. So, for him early '20. He currently has college mates with conditional offers at good unis to do GD already, based on getting the grades as their portfolios have passed muster.
My question (finally! 😊)- DS will be interviewed next Jan ('20). He will by then have his results and a portfolio.
If they like him, his grades and portfolio are good enough, will they offer him unconditional, as if he were in the Upper Sixth/Y13? Or might they slap a grade requirement for the Foundation on him just because he's doing it?
I understand that if his grades/ portfolio were 'borderline' they might want a grade in Foundation to demonstrate further development; but frankly, his teachers say he'd get in now with his predicteds and portfolio (conditional).
What do you think?