Trying to get into Tiananmen Square
01:08 UTC, 4 JUNE: I'm writing this post late on the night of 3 June. My colleagues and I have just come back from a quick tour of the city - on the 20th anniversary of the moment that tanks were sent in to end student protests.
Our first stop was Tiananmen Square. Before sunset, the square was sealed off. Police officers stopped us from filming even from a street across the road. One plain clothes officer (wearing a green basketball jersey) told us in colloquial English that we would need special permission to film inside the square for the next two days.
"You have to obey Chinese laws," he told us politely, "just as we would obey the Metropolitan police in London."
After dark, we headed to a street corner in western Beijing. We'd heard that a small group of elderly women were planning to hold a vigil. They wanted to light candles close to the spot where their sons were killed in June 1989.
But when we got there, there were no elderly women. Instead, a dozen or so police officers stood on the corner, checking the credentials of each of the journalists who'd turned up to cover the mothers' commemoration. A handful of passers-by watched us all from a distance.
"Keep moving," one police officer told us eagerly.
We then drove back along Chang'an Avenue, past Tiananmen Square, which remained sealed off.
From our experiences tonight, and from what we've heard from various campaign groups, it appears that - at the moment - the authorities in Beijing have managed to prevent any public commemoration of June 3/4 1989.
14:37 UTC, 4 June: Tried to get into Tiananmen Square just now. But the police stopped us. Plain clothes officers used a novel technique to stop us from filming - the umbrella treatment...