Perhaps Miguel found the silence awkward, but Bertie felt quite differently about it. Everything about the day even leading up to the point had been high stress and anxiety. The outbreak of war. The speech. Then everything that had followed, and the constant jabbering about his future.
He was also quite used to people walking him somewhere in silence. It was familiar.
There was one thing bugging at him, though, and it probably should have been the least of his concerns, given everything that was going on now. But there it was.