Martha's had a couple of drinks, and she's feeling pretty good about life, about being here. This party doesn't involve work colleagues or a risk to the hospital's reputation if there's a misstep, so things could really be worse, and she can cut loose.

As much as she ever cuts loose, that is. She's not done irresponsible in a very long time.

Even so, it's complete awkward accident when she turns and bumps into the man with dark glasses, and it only takes half a second for her to realise they're not an affectation. "Oh bollocks," she says, hand going to her mouth. "I'm sorry, mate, I should to w--be more careful."