Masterpiece is also doing a sequel to Up/Down. There was a 3 or 4 episode mini-series shown last year and they're in production with another mini-series to show this year. Jean Marsh, who plays Rose in the original, is in the sequel.
I think you'll enjoy it. It's much more understated and not as glitzy as Downton but it was very well done for the time it was made. I think my favorite episodes are in the later seasons when it gets into life during WWI. It gives a good perspective on civilian life during that time period, which is usually not very well addressed.
"I think the most un-American thing you can say is, 'You can't say that.'” Garrison Keillor