I'm not going as I missed out in the ballot so I can't go into the wondrous details that others could. But I did have an idea outside the box which was to go on holiday to Dubai for a few days (not too expensive from UK and great weather), then get scheduled, cheap, well-timed flights from there to Kiev for a 24-hour period. When I had a cursory look a week ago it looked OK; you'd basically get a free few days in Dubai, compared to the price of a day trip from UK. It's still a slightly mad route though because your flying about 8 hours each way just to Dubai, double the distance, and then coming back on yourself, and back out again. Only worth it if the idea of an unrelated holiday appeals to you. It appealed to me more than sitting on an Eastern European bus for 20 hours or whatever.
Edit: don't bother searching now; seems those cheaper flights have gone