Jeremy and Susan Everard are among a group of bereaved families meeting MPs in Parliament later.
The 33-year-old was kidnapped as she was walked home near Clapham Common and later murdered in Kent.
Ayse Hussein, whose cousin’s body was found in a fridge in east London in 2019, will be there too.
She says it’s wrong Jan’s killer could one day be freed.
The Ministry of Justice says an independent review’s looking at sentences.
