Labour could ban trans women from all-women shortlists in the wake of the Supreme Court's gender ruling.

The party's ruling National Executive Committee (NEC) is also poised to postpone the annual women's conference to avoid having to restrict attendance to biological women.

The moves are in a paper due to be considered at a potentially stormy meeting later.

The Supreme Court ruled last month that the terms 'woman' and 'sex' in the 2010 Equality Act 'refer to a biological woman and biological sex'.

Labour had previously operated its 'positive action' measures on the basis of self-identification, allowing transgender women to take part.