 And that was Louise Wateridge of UNRWA speaking to us a short time ago from Nusrat in central Gaza. As I mentioned, we did invite a spokesperson for the Israeli military to come on the programme, so far without success. But let's see if we can get the latest details with the BBC's Sebastian Usher, who joins us now live from Jerusalem. Seb, thanks for coming on. Let's start with that situation around the southern city of Khan Yunis.