[Mycroft is no stranger to the harsher realities of life. He's ordered unscrupulous things to be done on people, he's watched it, first-hand. He's taken it all in stride. What was necessary was necessary. It took a lot to affect him.

He's affected by this.

Especially with the situation about Sherlock and memories. Having to actively participate in keeping certain memories hidden through his entire life hit him harder than he would have expected upon hearing it.

The danger to his own person is hardly considered, though uncomfortable in his expectations that he might endure such himself.]

I see. Well, that...is good information to have, I shall take note of it.

[His voice betrays nothing, in fact he almost sounds bored.]