"Clearly you've just come from Number 10. You never get that smug look otherwise. And tell your PA that she should not have changed her perfume. Doesn't suit her. But the locked room case – don't pretend that it's for my benefit. We know as well as you do that you need me, don't we?"

He looked to his right. For an instant Mycroft wondered if he saw a tear. Then Sherlock continued.

"I'll text you as soon as we've finished this case… If nothing better has come up by tomorrow morning I'll send…"

Mycroft closed the door against the monologue.

Operating System Verse: Corruption