Since this photograph was taken in 1976, Greville Janner and George Thomas have been exposed as alleged paedophiles.
The pair, later ennobled as Lord Janner and Viscount Tonypandy, have been accused of preying on children and yesterday campaigners said there was growing evidence a Labour paedophile ring operated at Westminster.
A third former Labour MP, the late Leo Abse, has also been named as an alleged abuser.
Janner, 86, is the only one of the three still alive. Last month he avoided being charged with 22 counts of child sex, when prosecutors ruled he was too unwell with dementia.