When Ivor Novello is playing piano and singing in the drawing room after dinner, the aristocrats are polite - applauding after each song - or snippy, as with Lady Constance ("Please, don't encourage him"). The servants, however, are enraptured, listening to him play while in the hall behind closed doors, and it's kind of touching to see them having fun like this.
Also turns into a Crowning Moment of Awesome for Mrs. Croft; when Mrs. Wilson finds everybody listening, she snaps at them and tells them to get back to work, but Mrs. Croft stands up to her and says it's okay if they take a break for a few minutes.
When Mr. Meredith is having a sulk in the pantry and starts complaining to Dorothy, who tells him:
I believe in love, love, not just getting it, but giving it. I think that if you're able to love someone, even if they don't know it, even if they can't love you back, then it's worth it.
Both Mary and Isobel expressing concern for Elsie after she's sacked by the Mc Cordles for accidentally revealing about her affair with William in a public outburst. Elsie, who can be snarky around other characters in the film, is noticeably warmer with the two of them and expresses support for each of them before leaving.
After years of animosity between them, Mrs. Croft comforts her sister Mrs. Wilson after seeing her break down in tears at the end of the film. She tells her that she understands why she felt the need to give up her son after all this time, and assures her that Wilson's murder of William was something she did to keep Robert safe.