What is the accident happening in Regent Street?

W: Here’s the traffic news. And it’s a busy day out on the roads, isn’t it, John?
M: Yes, it is, Kate. Good morning. We have an accident in Regent Street. There’s a double-decker bus on fire. Everybody is OK, but traffic is moving very slowly. A large group of people are standing in the middle of Oxford Street. I can’t hear them, but I think they are standing in front of the cars and singing! So, traffic isn’t moving. The police are talking to them at the moment.
W: Can you tell us anything about the incident on Euston Road?
M: Yes, Kate. There’s a lion—yes, I said a lion—on Euston Road. I’m looking at the camera now. A lot of cars are moving slowly around it. It’s sitting in the middle of the road and looking at the cars...
W: Where did it come from? Do you have any more news?
M: Well, the police say that they think it escaped from the zoo. I’m waiting for more information on that. We have a report coming in now from East London. There’s big traffic problem. Someone
is driving on the wrong side of the road.
W: It’s another crazy day for drivers, then. Next traffic update at half past ten. Thanks, John.