A drunken sex attacker was jailed after two passers-by stopped his asault on a woman and restrained him until police arrived.
The 26-year-old victim was returning from a night out in central London but missed her bus and decided to walk home along Horn Lane about midnight on July 5.
Prosecutor Mark Kimsey said: "She became aware of the defendant walking towards her.
"He walked past her and nothing was said. The next thing she knew, she was grabbed from behind.
"She struggled and shouted as the defendant put his hand over her mouth and pulled her towards a shop front shouting 'Come on. Shut-up.' She struggled throughout as he managed to remove her underwear and undo his trousers."
The attacker Krzystof Przytula barked 'she's mine' when two men passing nearby tried to help, Isleworth Crown Court today heard on Friday (14).
But she managed to push his hand from her mouth and shout for help.
The men grabbed him and held on to him until police arrived and arrested him in a violent struggle, said counsel.
The 22-year-old, who refused to give police a home address saying he had just moved and couldn't remember it, denied a charge of attempted rape but admitted sexually assaulting the woman, who cannot be named for legal reasons.
His counsel, Michael Morris, said he could remember little of the event because of the amount of alcohol he had consumed. He was not used to drink since being involved in a serious accident.
Mr Morris said: "His future boss bought him lots and lots of tequila shots and he does not normally consume alcohol to any great extent."
He said the defendant told him: "I am an idiot. I am very ashamed. I realise I treated that person awfully and even if she forgives me, I cannot forgive myself."
Jailing him for two and a half years and ordering him to remain on the sex offenders' register for life, Judge Jonathan Lowen said: "This was an offence committed late at night on a public street against a young woman walking on her own.
"Fortunately for her two passers-by noticed what was happening. It is likely that your purpose was to commit an even more serious offence, but you were interrupted.
"I accept this was an impulse offence and that you were dis-inhibited by alcohol."