The Metropolitan Police says a second victim alleges she was assaulted in Westminster in 2010 and 2011 and in Camden in 2015.
Officers are already looking into claims a woman was assaulted by Weinstein in the 1980s.
The Hollywood film producer has denied any allegations of non-consensual sex.
No arrests have been made over any of the allegations, police say.
New York police are also investigating claims against Weinstein, including rape and sexual assault. – READ MORE[contentcards url=”http://www.bbc.com/news/entertainment-arts-41629689?ns_mchannel=social&ns_campaign=bbc_breaking&ns_source=twitter&ns_linkname=news_central” target=”_blank”]