View of the Houses of Parliament in Westminster, London, Britain, April 3, 2019. REUTERS/Henry Nicholls

LONDON (Reuters) - The upper house of Britain’s parliament will start debating on Thursday legislation to force Prime Minister Theresa May to seek a Brexit delay to prevent a potentially disorderly departure on April 12 without a deal.

The aim is to debate the legislation, which needs the approval of the House of Lords to become law, in a single day. Lawmakers in the upper chamber are due to begin discussing the legislation from 1030 GMT.

The lower house of parliament on Wednesday approved the bill by a single vote.