A Labour MP who posted a series of sexist, homophobic and derogatory comments on the internet has resigned from the Women and Equalities select committee.

Jared O'Mara said he was "deeply ashamed" of the posts which included a suggestion that it would be "quite funny" if the pop star Jamie Cullum died after being sodomised.

He also said he would like an orgy with members of the pop group Girls Aloud and posted another message in which he claimed a Pop Idol victor "only won because she was fat".

The MP for Sheffield Hallam, who was 26 at time, also criticised “the prevailing western tendency to deify fatties” and said that fat people do not “deserve our respect.”

Mr O'Mara said on Monday: “I am deeply ashamed of the comments I made online, which have emerged today.