David Cameron tells MPs that "a dreadful mistake" led to the collapse of the trial of John Downey, who was accused of the IRA bombing in Hyde Park in 1982.
But the Attorney General, Dominic Grieve, tells the Commons the judgement would not be appealed, in spite of a threat by Northern Ireland's First Minister to quit.
The Labour leader, Ed Miliband, challenges the Government over its commitment to tackling climate change.
Labour and Conservative MPs, from flood hit areas, threaten to withdraw support for the high-speed rail project, HS2.
And there are calls in the House of Lords for a cap on pension charges.
Susan Hulme and team report on today's events in Parliament.