Det Ch Insp Zoe Hendrick said: “This man has targeted two very vulnerable women, raping them in daylight hours in residential areas.
“Investigations of this nature are extremely rare and our priority since the launch of the first investigation has been to support the victims and identify the man responsible.”
Detectives followed up all the information they were given as a result of the previous public appeal, but were unable to identify the suspect, Hendrick said.
She added that she hoped with the passage of time, people who know something may feel different about coming forward.
“People with circumstances that might have changed, or they might feel now that they can divulge information, or they might see this appeal for the first time,” she said.
“I’d just like to encourage anyone to come forward.”
Anyone who recognises the man or has relevant information can call police on 101, or can contact Crimestoppers anonymously.
Listen to the best of BBC Radio London on Sounds and follow BBC London on Facebook, external, X, external and Instagram, external. Send your story ideas to [email protected], external
