to go to a centralised quarantine centre, almost 17,000 today. that would seem to indicate that it s going to take some time for that city to get back to zero infections, to enable them to lift the lockdown. and it s fears of this type of extended lockdown where maybe for months on end people are having to stay in their homes, that is what is fuelling concerns in beijing. i suppose some will be hoping that this mass testing might narrow down the areas of infection in the city and they possibly won t have to go into lockdown, but who knows? certainly with the omicron variant it is very hard to control it. here in the uk, a man has been arrested on suspicion of murder after four people were stabbed to death in london. earlier, i was joined by our news correspondent james reynolds, who gave us the latest updates on the story. victoria, the information we are getting at this moment comes