Are some shows/episodes abridged in any way?

I'm new to BritBox and glad to have it in my streaming lineup.

My Downton box set is packed away somewhere, so I started watching on BritBox, just to have something on in the background while I was doing chores around the house. A couple of times, I thought there might be some dialog missing here and there.

I'm in the US and I know that when Downton was on Masterpiece here, we sometimes got re-edited episodes that were sliced up and put back together to fit the time slot. So now I'm wondering if BritBox is serving up those US versions to US customers?