Welcome to our live blog of the BBC’s Question Time, which tonight features British National Party leader Nick Griffin on its panel.

Whichever side of the debate you fall on, no-one can deny that this has developed into a huge story. The BBC has defended its decision to invite Griffin on, Gordon Brown has predicted that it will backfire and security has been ramped up ahead of the show.

Question Time is broadcast at 10:35pm BST, so follow our live blog below during the build-up and the show itself. We really want to hear your views on the show - so send in your comments now!

Opposition leader David Cameron has delivered his speech to the Conservative party conference in Manchester.

Cameron told delegates there would be “painful” cuts in public spending, promised to send more troops to Afghanistan and stressed the importance of confronting “Labour’s debt crisis.” He also pledged to modernise the pension system, “break the cycle of welfare dependency” and cut back on bureaucracy to make life easier for entrepreneurs.

Cameron’s speech brings conference season to an end. Leaders of the three main parties — Cameron, Prime Minister Gordon Brown and Nick Clegg for the Liberal Democrats — have all laid out their plans for Britain ahead of a general election due by June 2010.

The ‘word clouds’ below have been generated using the complete texts from each of the leaders’ keynote conference speeches, in the order they were given. At first glance there are some striking similarities and fascinating overlaps — but we will leave it to you to draw your own conclusions.

How did you think each of the leaders performed? Who did you find the most convincing? Is David Cameron ready to lead the country?

Keywords from Nick Clegg’s speech:

Keywords from Gordon Brown’s speech:

Keywords from David Cameron’s speech:

Chalk and organic cheese would be an understatement.

There is a surprising public perception that there wouldn’t be much difference between a Conservative or Labour government, but there couldn’t be fewer similarities between the supporters of both movements and the two party conferences.

It would be hard to imagine union activists sipping on cocktails from the Knightsbridge luxury store Harvey Nichols stand at the Labour party conference in Brighton, but in Manchester thirsty Conservatives can enjoy an HN gin ricky.

They can also buy soft, pastel cashmere jumpers from Marks & Spencer or get a suit fitted in the market place. Cufflinks and chalices await those who visit the elite Carlton Club stall, along with limited edition portraits of icon Margaret Thatcher.

At Labour, union stands tend to dominate — reflecting their influence over the movement and the party’s reliance on their funding. The closest you can get to a Harvey Nichols cocktail by the main hall is a pint of tepid bitter from the hatch.

Beans on jacket potatoes, stewed tea and bacon buns with butter and brown sauce on sale in Brighton; fairtrade white chocolate muffins, herbal tea and organic, homemade sandwiches in Manchester.

And it doesn’t stop there. Outside the Labour party conference, radical socialists march past crying “Revolution!”, pro-Palestinian supporters picket. In Manchester, the anti-European UK Independence Party rally against the European Union and a few protest against hunting.

Of course there is some overlap but, at grassroots level, these two parties appeal to two opposite walks of British life.

While winning the middle ground will be crucial, the result of next year’s election will also rest on how successful both parties are at mobilising these very, very different breeds of voters.

Three big speeches have been delivered at the Conservative Party conference so far — by party leader David Cameron, the mayor of London and national bumbler, Boris Johnson, and the party’s spokesman on the economy, George Osborne.

What do all three men have in common apart from their membership of the Conservative Party? They were all educated at elite public schools (Johnson and Cameron at Eton and Osborne at St Paul’s) and all went to Oxford, where they were members of the same dining and social set, the secretive and selective Bullingdon Club.

They have all tried to play down their wealth and upbringing — Johnson has even made an appearance on Britain’s favourite soap opera EastEnders — but there is no erasing the fact that Osborne is an Irish baronet, Cameron is a direct descendant of King William IV and Johnson also has a sprinkling of royal ancestry, even if he has described himself as a “one-man melting pot”.

Opponents have pointed to the wealth and clique of the Conservative leadership to suggest the party is out of touch with ordinary, working-class Britain and unfit to govern. What do you think? Does class really matter when it comes to running the country?

The Sun trumpeted “It’s the Sun Wot Won It” after the Conservatives won the 1992 general election following the newspaper’s polling day headline “If Kinnock wins today, will the last person to leave Britain please turn out the lights”.

Five years later, Britain’s top-selling daily newspaper switched sides and backed Tony Blair and Labour at the next general election, remaining loyal to the centre-left party at the 2001 and 2005 elections.

But the tabloid has now flipped its allegiances and plans to support the Tories and David Cameron proclaiming on its front page on Wednesday that “Labour’s Lost it”.

“The Sun believes — and prays — that the Conservative leadership can put the great back into Great Britain,” wrote the paper, dedicating five pages to explain its decision, even moving its traditional page-three topless girl back to page seven.

With Brown even lagging the Liberal Democrats in the latest opinion polls, the Sun’s thumbs-down was another kick in the teeth for the beleaguered Prime Minister, just a day after he delivered a keynote speech to the Labour Party conference.

In a round of interviews on Wednesday, Brown put a brave face on the Sun’s thumbs-down, insisting: “The British people will decide the election, not a newspaper”.

The Sun is read by nearly three million people, but in an age where people increasingly get their news from rolling television news programmes and the Internet, is the tabloid’s decision a fatal blow for Gordon Brown’s political chances in next year’s general election?

Prime Minister Gordon Brown has promised to clean up politics, get tough on crime in his keynote speech to the annual Labour Party conference in Brighton. He also pledged to address the bonus culture that many blame for the financial crisis.

The ‘Word Cloud’ below (click the image for a larger view), produced by Wordle, shows the words he used most frequently.

The speech was an attempt to rouse his beleaguered party and win back the middle-class voters who flocked to Labour under Tony Blair. The latest opinion poll from Ipsos Mori put Labour down in third place for the first time since 1982.

Reuters Chief Correspondent Keith Weir, who is live blogging the Labour conference, said the key themes that struck him were Brown’s focus on families, health, crime and middle or mainstream issues.

What did you think of Gordon Brown’s speech? Have your views on him changed? Do you think he can still win a general election next year?

The Conservatives might be wishing they could have held their party conference before Labour.
Prime Minister Gordon Brown's address to his party conference in Brighton on Tuesday has thrown down a flood of new ideas, policies and initiatives from faster cancer diagnosis to choosing how Britain votes in what read more like an mini-election manifesto than a speech.
Brown played to his strengths (policy) and avoided trying to overcome his well-known weaknesses (not much of a political entertainer) in public. Trying to be someone else could have been a disaster for a man way behind in the polls to the Conservatives.
Whether it will be enough to make any difference to the polls remains to be seen -- Labour needs a miracle there after all.
But, for now, going for the policy jugular seems to have done the trick -- giving his browbeaten party something to get excited about and hitting the Conservatives where it hurts.
David Cameron's Conservatives have been accused of not giving enough detail on how they would govern the country if the polls are correct and they are to win power next year.
They will have to start showing their hand soon if they are going to convince voters that they have the ideas to run the country and aren't just a vote for change for the sake of it.

There haven’t been many highlights from the podium at this year’s Labour party conference so far, but business minister Peter Mandelson pulled the cat out of the bag.
A rip-snorting rouser of a speech on Monday — full of gags and inspirational lines — has energised the party faithful and left commentators drooling.
It was just what Labour needed given all the negativity around the party at the moment.
Way behind in the polls, scrambling for policies that will capture the public mood and seemingly doomed to defeat at the next election to the opposition Conservatives, a week-long conference in sunny Brighton could easily turn into a painfully long few days.
Prime Minister Gordon Brown takes to the stage on Tuesday and must follow Mandelson’s lead if he is to convince the doubters in his own party and beyond that he has what it takes to reverse Labour’s fortunes.
Brown is not known for his imaginative speeches but he needs to find one now.
He did it last year — when plotters in his party wanted him out.
Can he do it again?

The Labour Party conference in Brighton is crucial if the party is to start a revival that could give it a fourth successive term in office. As well as covering Gordon Brown’s big set piece on Tuesday, our team of three reporters will try to gauge party morale and give you a glimpse of what goes on behind the scenes beside the seaside.

You can follow our Twitter and video updates via our live blog, which will appear in the box below.

After more than a decade of railing against a Labour government that they feel has betrayed their shared socialist roots, British trade unions are now starting to fear what a future with a Conservative government will be like.

“They’re going to come after us like rabid dogs,” said Brian Caton, general secretary of the Prison Officers’ Association said — dubbing the Conservatives “the enemy”.

Activists may be disenchanted by a Labour government that they believe has pursued a pro-business agenda and failed to roll back anti-union legislation, but that is suddenly starting to look a whole lot better than a Conservative administration.

“God help us,” said John Thompson, President of UCATT, the construction workers’ union. “We’ll have never seen anything like it if this mob do get in.”

And a fear of more restrictive regulation and big public spending cuts is not encouraging the movement to offer an olive branch to the centre-right Conservatives, who are well ahead of Labour in opinion polls with an election due by mid-2010.

At a fringe meeting at the Trades Union Congress conference, GMB union chief Paul Kenny called Conservative leader David Cameron, pictured, a “clown”.

Even the most powerful of the union bosses are not afraid to admit that a Conservative government looks likely.

“You’d have to be blind, deaf and dumb not to see that Labour is in a great deal of trouble,” said Derek Simpson, joint general secretary of Britain’s biggest union Unite.

But no matter how bleak the future looks for the unions, they are not yet resigned to a Conservative future and are rolling up their sleeves for the fight.

“We’ve always fought for everything we’ve got,” said Kenny. “A poor Labour government is a hell of a lot better than a poor Tory (Conservative) government”.