A man is accused of beating his girlfriend before showing up at her work, threatening to "break her legs" and smashing through the Wealdstone building's glass when police were called.
Florin Fau, 23, of Vaughan Road, Harrow, allegedly attacked his partner of 16 months - grabbing her by the throat to the point that she "couldn't breathe".
He then allegedly tried to force his way into her workplace before smashing a pane of glass when a colleague tried to block him from entering, a court heard.
The Romanian national stood trial at Willesden Magistrates Court on Monday (December 4) accused of two counts of assault by beating, criminal damage, and common assault.
Mr Wettreich, prosecuting, told the court: "There was an argument on October 3 and the complainant asks the defendant to leave their home.
"Then the next day, October 4, the complainant, Patricia Petreus, returns home from work and finds the defendant in bed and asks him to leave.
"He pushed the complainant, slaps her multiple times, he grabs her causing her to fall to the floor, where he is holding her and picks her up and grabs her round the neck, in fact by the throat.
"On October 24, the defendant shows up and Patricia's place of work in High Road, Wealdstone.
"He wants to speak to her in his van and she refuses.
"The defendant tells Patricia if she doesn't come outside he would break her legs.
"She goes outside with the defendant and he grabs her by the arm and drags her towards the vehicle in the street.
"During the course of trying to so, he threatens her and makes a manoeuvre to assault.
"The extra charge of assault and criminal damage are to be shown today on camera."
Ms Petreus had detailed the alleged attack in a witness statement given on October 4, which formed the prosecution's opening statement.
But the court heard how her statement was later withdrawn. She told the court that she was actually in a "fight" with the defendent.
Mr Wettreich told the witness: "The statement given to police doesn't say you were fighting, it says you were struggling to breathe, and it only stopped when your housemate came home and you 'managed' to get away.
"If it was an even fight, you wouldn't need to 'manage' to get out of the room.
"You then make a statement later on on October 9. You said you wanted to withdraw the allegation? Do you want to tell us about that statement?"
Ms Petreus said: "I thought about what happened and I just wanted to get back with him and forget that it happened."
Mr Wettreich replied: "You just want proceedings to finish because you love him and want to get married."
Video footage, submitted as prosecution evidence and showed to the court, saw a man shouting at Ms Petreus's alleged colleague at the door, who was trying to keep him away.
The man is seen to push open the door and the victim flinches. The colleague stands in between them and asks him to "come peacefully".
After further commotion, the man is heard to shout, "I didn't f**king touch anyone", followed by, "Shut the f**k up" at the colleague.
Miss Gajathri Yogarajah, defending, asked Ms Petreus whether the original statement - or her account in court - was the truth.
"That I started the fight," she replied.
Miss Yogarajah asked: "Is it true that you got back together? And on October 23 is it true that he'd gone out and taken cocaine, and you didn't approve so you were annoyed at him?
To which Ms Petreus replied "yes".
'Of course I got scared'
On further examination, the prosecution played the video again.
He asked Ms Petreus: "Are you telling me that you did not feel threatened?
"Of course I got scared," she replied.
PC Daniella Wadman, attached to the Community Safety Unit at South Harrow police station, confirmed Fau was arrested at 3.50pm on October 28.
Fau denies all three assault charges but previously admitted criminal damage.
The trial was adjourned to continue at the same court on Thursday December 14 and Fau was remanded into custody.
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