Masterpiece with Alan Titchmarsh S01E011-S01E20

On Masterpiece, Alan Titchmarsh will guide teams of two around a stately home where they must try to find out which is the masterpiece out of all the collectibles.

Titchmarsh will guide the teams around a stately home, which will change with each episode. He will be joined by auctioneer Rachel Houston-Holland, who will give hints and tips to the viewers about what things are worth, but not the players, as the show goes on.

...It's basically Antiques Roadshow the Game Show.