British actress Emma Thompson has revealed that her daughter was sexually assaulted on a London Underground train last year.

The 59-year-old said her husband Greg Wise's daughter Gaia was 17 at the time of the attack.

Speaking on the BBC Radio Four programme Woman's Hour, she said: "My daughter had the experience of being felt up on the Tube and felt very nervous about going out and on the Tube for a long time afterwards.

"She said the thing that upset her most was not the act itself but the fact that she felt cowed enough by it not to call him out.

"And I think that's what we suffer as women most from is our shame at not being able to say 'Why are you doing that?'

"We're so shocked and undermined by these actions that we can't turn around and take the action that we want, and that's the thing that sits with us and sticks with us. Which is so unjust," Thompson told the BBC Radio 4 show.

The Academy award-winning star urged female victims of sex attacks to be less "unkind, to themselves too, whether they were able to defend themselves or not".

She added that they should be "compassionate about their reactions then say: 'Now, next time would I be able to do it differently as a woman?'"