He was wearing a dark green jacket, a white chequered shirt with black trousers and black shoes and spoke Polish.
Detectives have released two images taken on that night of the man they want to identify and speak with.
If you can help, call police on 101 or ‘X’ @MetCC and quote the reference: 01/7246845/25.
You can also report information anonymously to the independent charity Crimestoppers on 0800 555 111.