"Please." Guppy corrects Mycroft, automatically, not even looking up to see the glare. Sorry, hazard of having a doctor with two children under three.

"It's okay, the rats in here wash their hands and I'll clean it before putting it back in."

He eyes Sherlock. "If you start to feel dizzy or faint, let me know so we can get you flatter. You can have a proper lie down once we stop the bleeding."