Volunteer to go Back home but no travel documents

Hi,

My friends removal order came through few months ago and she decided to voluntarily go back to Pakistan. Her passport was with UKBA but expired now and now been told by her solicitor that they are not providing any travel documents or passport.

I wasn't convinced and thought ask experts here that what option does she have now, obviously she wants to go back and want to asap now but could't find a way.

Please can someone advise?

Thanks
S