Daniel had heard singing. Actually he had been awoken by singing and shouts of dismay, and he stomped downstairs when he realised they were arriving outside his door. Shooing Yvette away in case there was a raucous Daniel opened the door with a rolling pin ready to strike when a body almost fell on his feet.
"Oh dear God!" he gasped, hoping he wasn't dead but when he noticed him hiccuping the Doctor realised what was wrong. "Do you honestly need a Doctor for drunkenness?" he asked.