Err.... Sandra, I've finished with Mr. Garner now. Do you think you could pop through [and bring] me up-to-date on [the] arrangements for the Italian trip? By "pop through" the speaker is requesting Sandra to stop by for a short while. "on" here is grammar meaning "concerning". Do you think you could pop through and bring me up-to-date concerning the arrangements for the Italian trip?

Do you think you could come here so we can briefly discuss the latest details of the Italian trip.