New figures released Labour reveal that only 7% of the total TV workforce (on and off-screen) are women over the age of 50.
Meanwhile, the majority of TV presenters who are over 50 are men (82%).
Miriam O'Reilly, who won an employment tribunal against the BBC on the grounds of ageism, said:
These figures raise the obvious questions of where have all the older women gone and why did they go? Was it their choice to leave their jobs or was it a decision forced upon them?
The broadcasters say they are committed to the fair representation of older women, but the figures don't bear that out.
I'd like to know the reasons why so many talented women have disappeared, while their male counterparts have grown older and still have their jobs.
More top news
Danish submarine inventor Peter Madsen has been sentenced to life in prison for torturing and murdering Swedish reporter Kim Wall.
A BBC chief said reporters also had a responsibility to be sensitive in their broadcasts.
Ruth Smeeth is due to give evidence at a hearing involving party member Marc Wadsworth.