"Oh that wasn't the ship, that was me. Last night the two of you were sleeping I fetched a few things. Went back in time and stole your uniforms after you were done with them, had Steve's adjusted naturally. Thankfully the TARDIS does dry cleaning."
She smiled innocently at both of them. Thinking about it she amended, "Well, I suppose the TARDIS helped. So. Possible trap? Yes, it is a bit suspicious that a distress signal is coming from a planet that appears to be the antithesis of distress. It could be a secret message from someone afraid to speak up, however, so I would refrain from asking about it and... Play it cool, as they say.
"Space etiquette can be tricky. Thankfully we're aliens and they should be fairly cosmopolitan and forgiving. Be polite and try not to stare. My understanding is the royal family has posthumous claims on occupied planets. When a planet dies or its civilization collapses, they have rights to mine whatever resources the living left behind. Clever business model, actually. The prince we're visiting has a posthumous claim on Earth, in fact, which unfortunately means he is under strict rules of non-interference. He isn't allowed to hedge his bets or try to shape the state of planet once it's no longer occupied. Just recycles whatever is left and hopes for the best."