Detectives are making fresh appeals for information to trace a sex attacker who has been targeting women in Acton and asking women to stay vigilant in the area.
Officers previously appealed for information on April 12 following a series of assaults, believed to be linked, between 3 January and 9 March 2016.
The Metropolitan Police released a CCTV image of a man they would like to identify and speak to after a 24-year-old woman walking from East Acton tube station around 10.25pm was attacked.
She was approached by a man from behind and was assaulted before her attacker fled the scene.
The suspect for that offence is described as being of white or Asian appearance, between 20 and 32 years, 6ft in height, of slim build with dark hair.
He wore a dark parka-type coat with a fur-trimmed hood.
He also wore shoes with light-coloured soles.
Other reported attacks possibly linked, as more women grabbed and attacked from behind
Investigating officers are looking at the possibility that this assault is linked to three other previously reported incidents in Acton.
The first incident involved an 18-year-old woman as she walked along St Andrew's Road, W3, on January 3.
This shows the suspect wearing what appears to be the same coat as in the incident on 9 March.
The victim in this offence was listening to music with her headphones in when a suspect grabbed her from behind and reached round to her chest.
The victim struggled and the suspect fled the scene.
The second incident took place along Hoylake Road on 25 January, as a 27-year-old woman walked from East Acton tube station towards her home address.
She was talking on her mobile when a man grabbed and assaulted her before running away.
The third incident involved a 38-year-old woman as she walked along Trinity Way on February 4.
The suspect grabbed her and made suggestive comments before fleeing.
Detectives ask women to be vigilant, especially when walking home
The incidents were originally being investigated separately but intelligence work has now led to them being linked.
Whilst currently there is no forensic evidence linking them as sexual attacks, all four incidents are now being investigated by the Sexual Offences, Exploitation and Child Abuse Command and work continues to identify the person responsible.
Detectives are keeping an open mind regarding the suspect, and any motive, and are asking women to be vigilant, especially when walking home from tube stations and whilst using their mobile phones or whilst wearing headphones.
They are also appealing for anyone who may have been the victim of any unreported attack - violent or not - to contact them.
Detective Inspector Ash Hornsby, who is leading the investigation, said: "As part of extensive enquiries, CCTV in relation to the offence on 3 January has now been obtained and reviewed.
"The suspect appears to be wearing the same coat in the attacks on this date and the offence on 9 March.
"A similar coat is also described in the offence on 25 January, although this may not necessarily be the same person.
"It is essential we identify and speak to the man or men in the CCTV images.
"I would ask the public to look carefully at both images and, if anyone recognises the suspect, or has any information as to who he is, or where he can be found, to contact police immediately."
He added: "I would also urge anyone who was in any of these locations on the days and times of these offences and who may have seen any assault or anything suspicious to get in touch.
"Equally, if anyone has been the victim of an as yet unreported assault then they are urged to contact police."
Anyone with any information is requested to call the investigation team on 020 7161 9702 or via 101. Information can be provided anonymously through Crimestoppers on 0800 555 111 or via crimestoppers-uk.org
