LONDON, Sept 6 (Reuters) - The British parliament’s upper chamber on Friday approved a bill which aims to block a no-deal Brexit at the end of October by forcing Prime Minister Boris Johnson to seek a delay to Britain’s European Union departure.

The legislation, which requires Johnson to ask for a three-month extension to Britain’s EU membership if parliament has not approved either a deal or consented to leaving without agreement by Oct. 19, is expected to be signed into law by Queen Elizabeth on Monday.

The House of Lords approved the bill without a formal vote at its final stage. (Reporting by Kylie MacLellan)