Cristina Moreira, a 24-year old lady has been missing since Thursday, 20th August 2015.
The lady who is known as Funmilaye Oluyedi was last seen at her place of work in Hammersmith and Fulham where she appeared to be very unwell with an unknown condition.
She left the premises after declining medical attention and never attended a meeting she was due attend at her workplace on Monday, 24th August.
Police are seeking public help in locating her. There is every possibility she requires medical attention, officers say.
Police are asking anyone who has seen Cristina and knows where she is to contact them on 101 or 020 7275 3057.