Tom's last episode? I'm gutted!
As far a we know, yes.
It was announced a couple of weeks ago that he was leaving. It was said that apparently he and Nikki make a go of things, it doesn't work out and he leaves to work in America. It also stated that the postponed episode was his last.
That means either they've reshot and edited the end of this or all we'll get about Harry's departure is a few lines at the start of next series. Which is anti-climatic tbh!