A 59-year-old woman was heard screaming in terror after being raped in a horrific late-night attack in a park.
A group of friends climbed into the locked Inwood Park, Hounslow, in the early hours of the morning after hearing a woman's terrified shrieks, police said.
Inside, they found a victim who told them she had been raped.
Detectives today issued CCTV footage of a man they wish to question in connection with the alleged attack.
A Scotland Yard spokesman said: "Detectives have recovered CCTV from the nearby High Street, Hounslow, which shows the 59-year-old woman heading inside a cab office.
"At approximately 1.15am, CCTV shows her leaving the cab office and walking along Hanworth Road towards the park with an unknown man."
The attack is said to have happened about two and a half hours later at 3.40am on July 10.
The man police wish to speak to is described as approximately 6ft tall, clean shaven with short dark hair.
Contact police on 101 or via Crimestoppers Crimestoppers anonymously on 0800 555 111 with any information.
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