Representatives of seven major political parties appeared in a live BBC debate
Debate began with tributes to London Bridge victims and emergency services
There were clashes over spending plans, the economy, the NHS, Brexit and immigration
PM returned to No 10 after terrorist incident to chair an emergency Cobra meeting
Parties suspend campaigning in London
Jonathan Blake
BBC political correspondent
Police numbers was already a campaign issue - even more so after today’s attack.
Labour's Rebecca Long-Bailey talks of underinvestment under the Conservatives, while SNP leader Nicola Sturgeon suggests that Brexit would mean weaker co-operation with EU countries on security.
Nick Eardley
Political correspondent
There's lots of early focus on London Bridge during this debate - and the first question is about how to tackle security issues.
Understandably, the tone so far is more discursive and there's little disagreement on supporting police to tackle security concerns.
Reality Check
Claim: In his opening statement Adam Price, the leader of Plaid Cymru, claimed that in Wales a "third of our children [are] living in poverty".
Verdict: He's roughly correct, according to the official government figure, external.
Child poverty, on this measure, is defined as coming from a household that has income below 60% of median income (that's the one you get if you ranked every household in the country in order of income and take the middle one) after housing costs.
The figures show that 29% of children in Wales were in poverty in 2017-18, a rise of one percentage point compared with the year before, although it had been at higher levels for most of the previous decade.
The corresponding figure for England was 31% (reflecting higher housing costs) up from 30% a year earlier.
Jonathan Blake
BBC political correspondent
Familiar messages from all parties in their opening statements.
Some, but not all, chose to mention the London Bridge attack before setting out their stall.
The Brexit Party’s Richard Tice says he believes the UK can have an "amazing future" outside the EU if Brexit is "done properly".
He also says his party will enact "major political reforms" to "restore trust" in democracy.
He pledges his party will "change politics for good".
Nicola Sturgeon for the SNP says she wants to create an independent, outward-looking Scotland.
But she says they also want to play their part in locking out Boris Johnson from Downing Street.
She says his government would mean "chaos for years to come".
His trade deal with Trump would mean the NHS is on the table and weakened food standards and worker's rights.
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Plaid Cymru leader Adam Price claims Wales (which voted Leave) now wants to remain in the EU, but does not want to "remain in poverty".
He says Westminster has not offered "leadership" or "hope", adding that "can only come from us, from all of us who live in Wales".
He says he hopes the winter election can lead to a "Welsh spring".
Rishi Sunak for the Conservatives pays tribute to police and the public after the London Bridge attack.
He says everyone is frustrated and Parliament is going round in circles.
We all want to move on, he says, and the Conservatives' Brexit deal is ready to go.
He says they will bring it back to Parliament and leave by the end of January.
Then we can get back to the country's other priorities like the NHS, schools and cutting crime.
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Nick Eardley
Political correspondent
Tory sources have confirmed that PM has cancelled all political events tomorrow to focus on London Bridge.
Labour has suspended campaigning in London this evening following the London Bridge terror attack.
Jeremy Corbyn said in a statement: "My heart goes out to the victims of this appalling attack.
"We owe a deep debt of gratitude to our police and emergency services, and the brave members of the public who put themselves in harm’s way to protect others.
"We must remain united across all our communities, and we cannot let our democratic process be derailed by acts of terror.
"We are suspending campaigning in London tonight as a mark of respect for those who suffered in this attack. We will not be cowed by those who threaten us.
"We must and we will stand together to reject hatred and division."
Labour’s Rebecca Long-Bailey also begins her opening statement by saying her thoughts are with those affected by the terror attack, and also thanks the emergency services.
She says her party will offer a "real choice" at this election, and that Labour will put the government "on your side" and "build a fairer Britain".
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Caroline Lucas for the Green Party says she wants to correct one big lie and tell one truth.
The lie, she says, is "get Brexit done". She says Boris Johnson's deal will mean years of wrangling.
The truth is the climate emergency, that the world is on fire from the Amazon to the Arctic.
She says this election is an opportunity to avert disaster and fix Britain for good.
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First up to make their opening statement is Lib Dem leader Jo Swinson.
She starts by paying tribute to members of the emergency services who were at this afternoon’s stabbing attack at London Bridge, and people affected.
She says stopping Brexit will deliver more money to spend on public services, and invest in "our children's future".
She urges voters to vote for a "brighter future" under her party.
Jonathan Blake
BBC political correspondent
Don’t expect too much of a grilling tonight.
Host Nick Robinson explains that under the debate rules, the audience cannot cross-examine the participants, and neither can he.
Tonight's debate will not be broadcast on the BBC News channel, which will continue to cover the London Bridge attack.
Watch the seven-way leaders debate on BBC One and BBC iPlayer or on this page.
...and here are guides to the other four politicians taking part:
Image source, ReutersScottish National Party: Nicola Sturgeon. The SNP leader and Scotland's first minister since 2014, her party was the third-largest in the Commons in the last Parliament.
Image source, PA MediaPlaid Cymru: Adam Price. Leader since 2018, he was formerly MP for Carmarthen East and Dinefwr (2005-2010). Aged eight, he told the then Prime Minister, James Callaghan, he wanted to be "prime minister of Wales".
Image source, AFPThe Green Party: Caroline Lucas. The former leader and co-leader is the party's first and, so far, only MP. She was an MEP before entering Parliament.
Image source, PA MediaThe Brexit Party: Richard Tice. The chairman and businessman is a close ally of Nigel Farage. He was elected as an MEP in May.
There's not long now until tonight's debate gets under way. Here are brief rundowns of three of the seven party representatives:
Image source, Getty ImagesConservatives: Rishi Sunak. The chief secretary to the Treasury is second-in-command to the chancellor. He's been an MP for four years - before that, he was a banker and hedge-fund manager.
Image source, PA MediaLabour: Rebecca Long-Bailey. The party's shadow business secretary has been tipped by some to be Jeremy Corbyn's successor. She has also been the party's shadow chief secretary to the Treasury.
Image source, Getty ImagesLiberal Democrats: Jo Swinson. The Lib Dems' first female leader has been in the role since July. She was the youngest MP when first elected, in 2005, and became a business minister in the Lib-Dem-Conservative coalition government.
We're about to get started on tonight's debate, featuring seven political parties in Cardiff. It'll begin with opening statements from the party representatives, followed by questions.
We'll bring you coverage of all the questions and answers as they happen.
Image source, ReutersSir David Attenborough has weighed into the row about Boris Johnson's non-appearance at Channel 4's climate change debate last night, branding it "shameful".
"I mean, I don't know what else he had to do, but it would have to be very, very important to dodge this one I think," he told Channel 4 News.
The Conservatives have complained to broadcasting watchdog Ofcom about Channel 4 about the broadcaster's decision to replace the PM with an ice sculpture.
Image source, Getty ImagesThis evening's debate will feature leading politicians from seven major political parties.
To refresh your memory on everything from party basics to key manifesto pledges, here's our guide to the parties taking part.