I'm applying post-results this year so they SHOULD all be unconditional (unless they want me to do my grade 8 exam or something).
Last year when I was applying though, I got a reduced offer. 56 UCAS points, down from 64 (this was for an FY). I ended up firming it BUT I would have firmed it even if the offer was higher. It got reduced because I went to an offer holder day (no interview or anything, just attendance).
If it's of any interest to anyone, I did end up dropping out (hence my reapplying this year) and my grades WAY exceeded my offer (I got Dist A B in a BTEC SubDip, as-level and a-level, which is 108 UCAS points).