I think Thames and City were talking all into accepting a tailwind into runway 10. When one DLH could not guarantee a landing would be successfully accomplished on Rwy 10 first time, the ATCO said he could not offer him an approach, and therefore he diverted to STN. I don't think this was the first one that you saw go-around though, that happened earlier.
Methinks they needed to get some stands emptied and wanted to depart on Rwy 28 for these. Obviously aircraft still landing on 10 makes this a bit trickier.
