Nick Clegg has called for major reform to the House of Lords in the wake of allegations of expense abuse against a peer who has already been jailed once over his claims.
"A big part of the problem is that, right now, a place in the House of Lords amounts to a job for life," the Deputy Prime Minister wrote in the Daily Mirror. "Unelected peers don't need to seek voters' consent.
"Our Parliament should be the envy of the world: a modern, transparent and democratic institution. Instead it's a relic from the 17th century."
Mr Clegg accepted that the Lib Dems had failed in their drive to secure an elected House of Lords during this Parliament.
But he added: "The British people deserve better. This latest scandal must re-energise our call for change. At the next election, my party's manifesto will once again contain a clear commitment to an elected second chamber."
More top news
Firefighters across California have been battling major wildfires in what could be the most destructive wildfire season on record.
This summer's fundraising juggernaut, the ALS Ice Bucket challenge, has raised almost £7m in the fight against Motor Neurone Disease.
Winning entries from the Astronomy Photographer of the Year 2014 competition have been unveiled.