Westminster attack: PC Keith Palmer named as police officer killed – as it happened

• Theresa May was accused by Jeremy Corbyn of breaching a Conservative manifesto pledge not to cut education funding, prompting her to launch a personal attack on the Labour frontbench for sending their children to private and grammar schools.

• May has defended the Conservative party’s response to the accusations that led to it receiving a record £70,000 fine for not properly declaring election expenses. At PMQs the SNP’s Pete Wishart asked:

Last week the Electoral Commission issued its largest-ever fine on the Conservative party for breaking vital and crucial election rules. What did the prime minister, the cabinet, her aides, know about any of this activity? Who was responsible for designing and signing off all of this? Do you agree with me that this is at best woeful negligence, and at worst pure electoral fraud?

May replied:

You are asking me to respond to what is a party matter, but I can assure you that the Conservative party did campaign in 2015 across the country for the return of a Conservative government, and we should be clear that such campaigning will be part of the party’s national return, not candidates’ local return, as the Electoral Commission itself has said.

The party accepted in April 2016 it had made an administrative error on its national spending, it brought that to the attention of the Electoral Commission in order to amend its national return.

As I say, national electoral spending is a question for the national party, not for individual members.

The Electoral Commission has looked into these issues, as it has for issues for the Liberal Democrat party and the Labour party. It has issued fines to all three parties and those fines will be paid.

• May has said that MPs will get a free vote on the proposals to decant from the House of Parliament to an alternative Westminster venue to allow multi-billion repair works to be carried out.

• Chris Grayling, the transport secretary, has told MPs that an “evolving threat” led to his decision to impose the laptop cabin ban on flights from some countries. In response to an urgent question in the Commons, he said:

We respond in aviation security to the evolving threat that we face from terrorists. And there are some things that we make public and others that we don’t. I’m not going to give [MPs] full details of the background to the decision we have taken. It is a response to an evolving threat ... Suffice to say to the House, we have taken the steps that we have taken for good reason.

• Tim Farron, the Lib Dem leader, renewed is call for a referendum on the final Brexit deal, saying David Davis, the Brexit secretary, backed the idea until quite recently. Proposing a 10-minute rule bill on this, Farron told MPs:

The secretary of state for Exiting the European Union not long ago made the case very eloquently for what is now the Liberal Democrat proposal. He used the phrases: ‘mandate referendum’, and ‘decision referendum’ ...

I couldn’t agree with the secretary of state more. It is a shame that the secretary of state doesn’t agree with himself anymore.

Farron was referring to this speech Davis gave in 2012.

• Labour should suspend MPs disloyal to Jeremy Corbyn, including Chuka Umunna and Wes Streeting, Ken Livingstone has said.

• The lord chief justice, Lord Thomas of Cwmgiedd, has launched an attack on the justice secretary, Liz Truss, for her failure last year to defend judges who were branded “enemies of the people”.

• Talks aimed at restoring power sharing in Northern Ireland continued at Stormont in the hours after it was announced that the former deputy first minister Martin McGuinness had died.

The SNP’s Alan Brown says the announcement implies the government does not trust the security arrangements at airports in the countries affected.

Grayling says he does not want this to be seen as a vote of no confidence in security arrangements in these countries.

Tom Pursglove, a Conservative, asks what consultation there was with airlines before this was announced.

Grayling says the government has been in regular contact with them over recent days.

Grayling says he is not saying to people that they should not travel to the countries affected.

Grayling says he hopes these measures will ultimately prove to be temporary. But decisions will be taken on the basis of passenger safety.

Labour’s Lilian Greenwood asks what discussions Grayling has had with his counterparts in other countries about the rules for transfer passengers.

Grayling says the government has been in contract with other countries. They will take their own decisions.

22 Mar 201709.05 EDT

Heather Stewart

In the huddle for journalists after PMQs, Downing Street sources doubled down on May’s personal remarks about where Jeremy Corbyn and other members of the shadow cabinet sent their children to school: and indeed where the Labour leader himself was educated.

“She was clearly making the point that there seems to be one rule for the people mentioned, and another rule for the rest of us,” the source said, adding that, “consistency” was important in politics.

Some of the Tory critics of the government’s grammar schools, including Stroud MP Neil Carmichael, have admitted sending their own children to grammars.

Labour’s Derek Twigg asks if Grayling is confident that a terrorist would not be able to get a laptop with a bomb onto a plane leaving a UK airport.

Grayling says he thinks security at UK airports as high as anywhere in the world. He says the government is happy with the rules currently in place, but keeps them under review.

The SNPs’ transport spokesman, Drew Hendry, asks what extra resources will be made to UK airports to help them deal with this.

Grayling says these rules do not apply to UK airports. But the government has asked them to “think ahead” in case that changes.

Sir Desmond Swayne, a Conservative, asks why laptops etc are safer in the hold.

Grayling says he cannot discuss this.