Five British soldiers have been killed in Afghanistan after a policeman they were training opened gunfire. BBC correspondents Caroline Wyatt and Ian Pannell reported on the latest in the incident.

The chairman of the Commons intelligence and security committee Kim Howells has called for the phased withdrawal of British troops from Helmand province.

The former junior Foreign Office minister said the billions of pounds that would be saved should be redirected to defending the UK from terrorist attacks by al-Qaida. Mr Howells discussed his proposals.

The much-discussed package of reforms to the expenses and allowances system in the House of Commons is to be put before MPs.

The Kelly Report will propose radical changes which many MPs are reluctant to adopt. Conservative leader David Cameron will also give a speech on his party's Europe policy. Political editor Nick Robinson commented on what promises to be an eventful day in Westminster.

Will MPs adopt the changes outlined by Sir Christopher Kelly's report into parliamentary standards? Times columnist Rachel Sylvester and president of Yougov, Peter Kellner, discussed how the report's recommendations will affect parliament.

The Conservatives will outline their policy on Europe after announcing they would not hold a referendum on the EU Treaty if coming to power in the next general election.

Speaking to The Sun in 2007, David Cameron promised a "cast iron guarantee" that a Conservative government would allow the British public to have their say, and shadow foreign secretary William Hague recently vowed to "not let matters rest there" if a treaty was ratified before they came to power.

The Sun's associate editor Trevor Kavanagh and former Conservative cabinet minister Michael Portillo examined Tory European policy.

Conservative leader David Cameron is to unveil the party's new policy on Europe, after announcing the party would not hold a referendum on the EU treaty if they won the next general election.

The Tories previously said that if the Lisbon Treaty were ever to be ratified by all countries, the party "would not let matters rest there". Eurosceptic Tory MP Mark Pritchard commented on his party's policy on Europe.

A nationwide march commemorating the anniversary of the 1979 siege of the US embassy in Tehran will be turned into an anti-government rally.

Opposition protests are banned in Iran, but protestors are hoping to use the official demonstration as a ploy to protest against President Ahmedinejad.

The head of Tehran's anti-riot police has threatened opposition protesters with a full-scale assault if they return to the streets. Iranian opposition journalist Masih Alinejad assessed the violent clashes.

Former American vice president Al Gore, noted for his strong stance on climate change, has written a book arguing that the public is willing to make changes in their behaviours to reduce the impact of climate change.

Mr Gore spoke to Today presenter James Naughtie about his optimism that the growing movement against climate change would spur the world's leaders to act.

He explained that while individuals changing light bulbs and fitting insulation played a part, "more important is changing the laws and policies". But with sustained pressure, he says, there is cause to be hopeful that progress can be made at the Copenhagen summit.

This is an extended version of the broadcast interview.