Stephen Hepburn
Party's ruling National Executive Committee met to decide former MPs' fate.
Hope Not Hate urges party's ruling body not to lift Williamson's suspension at a crunch meeting where Keith Vaz and Stephen Hepburn's cases will also be heard.
Jarrow MP is alleged to have targeted a female party member in her 20s back in 2005.
Shadow minister Chi Onwurah and Jess Phillips call for party to act.
He is said to have cornered a woman, allowing her "little or no freedom of movement", during a night out in 2005.