Harriet Harman and other MPs have tabled a Parliamentary motion calling on the Government to help locate 200 schoolgirls abducted by Boko Haram militants in Nigeria.
Foreign Secretary William Hague earlier said the Government is offering "practical help" to the Nigerian authorities.
The Nigerian military has flown more than 300 sorties in the hunt for the abducted schoolgirls, a Major has told ITV News' Rageh Omaar.
A newly released video from Boko Haram reportedly shows the kidnapped Nigerian schoolgirls.
The man who started a viral hashtag campaign in support of the kidnapped Nigerian schoolgirls says it has forced the government to act.