A serial sex attacker who targets young females during rush hour is thought to have assaulted his 25th victim.
Detectives believe a white man, in his 40s with blue eyes, has carried out all the attacks over the past year.
His victims are women and girls as young as 13, all attacked during the morning or afternoon rush hours in south London.
Police have released CCTV footage of the suspect, which shows him running and walking near the scene of the latest attack on a 15-year-old girl in Sandbourne Road, Brockley, just after 8.30 am on 22 November.
In the video he appears to be slim with greyish hair and is wearing a dark coat and blue trousers or jeans.
Detective Chief Inspector Andrew Furphy of the Metropolitan Police said: “These offences have been traumatic for the victims, all of whom have been young females going about their daily lives.
“There is a strong possibility that these incidents are part of a linked series of attacks as a number of victims have provided very similar descriptions of the attacker – a white man aged between 40 and 50.
“Our officers have been working tirelessly to apprehend the suspect, but we need the public’s help.
“CCTV shows footage of a male that we would like to speak to who we believe may be able to assist our investigation. If this is you or if you know who this person is, please contact us.”
Police believe there may be more victims who have not reported attacks and are urging them to do so.
The first attack is thought to have been on a 13-year-old girl in Orpington in October last year.
Most of the assaults have happened in the boroughs of Lewisham and Greenwich, but there have been others in Southwark, Bromley and Bexley.
Police said they had increased patrols in those areas and were advising schools and community groups.
Anyone with information is asked to call police or ring Crimestoppers, anonymously, on 0800 555 111.