I saw them too but you all missed the best part. There was a show of at least 20 of them at first all rising slowly glowing orange lights. They disappeared into the clouds north of oxford street. THEN there was a pause and about 6 more showed up as was mentioned. The last one took a while to disappear. there were so many my first thought was wtf but then it occurred to me they may have been Chinese lanterns or something but they would have had to be huge ones at an event or something and i couldn't find anything about it. I checked the time at 8:14 wondering if it was happening on the hour.