Pressure mounted on the government yesterday to delay next month’s introduction of home information packs. Financial Times

Ministers came under fire from peers as the Tories and Liberal Democrats pledged to join forces for a last-ditch parliamentary effort to block the regulations.

The Conservatives plan to table a motion in the Lords next week in the hope of forcing a vote on the packs.

A Lords vote to block the rules would break the longstanding convention of peers not opposing secondary legislation. But this was breached last month when they blocked government plans on casinos.

A Lords committee this week grilled officials from the Department for Communities and Local Government over the packs.

Key organisations such as National Association of Estate Agents, the Council of Mortgage Lenders and the Royal Institution of Chartered Surveyors have failed to give their wholehearted support for the packs.