Re: Circling or straight-in minimums?
ATC can, and does, give circle to land instructions with an ILS or any other precision approach - although they should stated circle (insert cardinal direction) RWYXX.
If you broke out at circle minimums, and tower changes it to 28, then you would go with the straight in minimums. . . but, since the circle minimums are higher than the straight in minimums - for which you already broke out of. . .you're fine.
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