Had exactly this happen today for the first time at the Pilot fly-in at Duxford.
Already done 1 g/a and on 2nd approach, the bi-plane ahead didn't vacate very quickly despite being told to, continued approach, saw it vacate, (both tar and grass) runway clear but radio blocked with people cutting over each other, not waiting before a response was given to previous caller and causing the afis guy to become a little confused as to who was where.
By the time we got the call in for exrememly short final, we had held off half way down the runway and passed the bi-plane that had vacated and had a clear runway ahead but before he could reply to us due to other people cutting in on the radio, we had already landed, so he just told us to vacate left and park.
Possibly not the right thing to do, but the circuit was extremely busy and didn't think going around again would help the situation by just adding another a/c back into it when there was no reason for us not to land aside from a busy radio -and no cars were about to cross in front of us before anyone pipes up, I could see that clearly wasn't going to happen otherwise I wouldn't have landed.
- awaits incoming flack !!.
