Image source, @AlecShelbrooke

Alec Shelbrooke is among MPs holding constituency surgeries as usual - less than 24 hours after the death of Sir David Amess.

The Conservative MP for Elmet and Rothwell in West Yorkshire tweeted:, external "We cannot let events like this diminish the deep relationship between an MP and their constituents.

"This is a relationship I value deeply: I want my constituents, regardless of whether they voted for me or not, to be able to approach me in the street, in the pub, at the supermarket or at one of my surgeries."

Fellow Tory MP Robert Largan, also met people in his High Peak constituency in Derbyshire.

Home Secretary Priti Patel says many are struggling to come to terms with the killing of Sir David Amess, whom she described as a "dear and loyal friend".

"As an Essex MP he was a neighbour of mine, he was deeply loved," added Ms Patel. Watch her comments below.

Police Scotland has written to all members of the Scottish Parliament individually, following the death of the MP Sir David Amess.

Presiding officer Alison Johnstone told fellow MSPs about the police contact in a letter, which also says all thoughts are with Sir David's family, friends and colleagues.

She says the Scottish Parliament will provide MSPs with any security advice and support they require.

The mood in Leigh-on-Sea is one of bewilderment.

Sir David Amess had represented the area for decades and his constituents speak warmly of a man who dedicated his life to serving them.

Abigail Mkhize and her sister Ntombi spoke of their sorrow as they explained why Sir David was so special to them.

In between tears, Abigail said he had been there for her and her family.

The agency nurse who has lived in the Southend area for 20 years went to see Sir David six years ago when she was having chemotherapy and needed help getting employment support allowance.

"The kindness, he said you have been here a long time, this is not right. He said I will sort it out and he did, he did," said Abigail Mkhize.

"He was just a normal human being. We just can't believe it. He was the father of all nations, whether you are black or white, irrespective of where you came from.

"He was like a father to everyone, we just can't believe it, can't believe it. I know so many people he helped.

"He told me about his twin girls as I work in the special baby care unit, he was one of us, an amazing man, just an amazing man. We are very upset. We are mourning with them (his family), and thinking of them," she added.

• Read more from Leigh-on-Sea here

BBC Monitoring
The world through its media

There has been extremely limited jihadist reaction online to the killing of British member of parliament Sir David Amess.

A clampdown on jihadist accounts on their messaging app of choice, Telegram could have affected the volume of reaction.

The Sanam News Agency, a jihadist news-focused channel, factually reported on the incident, highlighting Sir David's membership of the Conservative Party.

Targeted searches for reactions on Telegram and the decentralised platforms RocketChat and Element, which jihadists also use, have failed to yield relevant results at the time of writing.

Both Islamic State group (IS) and its rival al-Qaeda, and their supporters, have previously incited lone wolf attacks in the West, including against political targets.

IS is often quick to claim such attacks when the perpetrators have declared their allegiance or been killed. Claims are rare when the perpetrator is detained.

Sir David Amess has campaigned for years for Southend to become a city - mentioning it virtually every week in Parliament.

Just a few days ago, he told BBC Radio Essex that his plan was "to wear them down until they say yes".

"I’ve spent all my time mentioning it at every conceivable opportunity," he told presenter Sonia Watson.

"If they’re sick to death of hearing all the reasons why Southend should become a city then they should grant it to us, it’s a no-brainer, the benefits are enormous.

“We are engaging local residents in the situation, we’ve got some great events planned and we’ve got a wonderful team of people who are putting our bid together so I’m really, really excited about the prospect.

"It could absolutely transform things in Southend and raise civic pride."

If you're just joining us, here's what we know about the death of Essex MP Sir David Amess who was stabbed while meeting constituents in Leigh-on-Sea yesterday.

• Police say they are treating the killing as terrorism which is potentially motivated by Islamist extremism
• A 25-year-old man has been arrested in suspicion of murder and officers are searching two addresses in London
• Prime Minister Boris Johnson and Labour Leader Sir Keir Starmer join many in laying flowers at the scene
• Home Secretary Priti Patel calls Sir David "a man of the people" who died doing the job he loved
• Tributes pour in for the married father-of-five who is remembered as an animal lover with a sense of fun who tirelessly campaigned for the rights of others

Sir David Amess asked Boris Johnson what the police, society and Parliament could do to tackle knife crime after the death of a constituent earlier this year.

In response, the PM said the government was recruiting more police officers to fight crime, tackling county lines drug gangs, and lengthening sentences for those convicted of knife crimes.

Philip Grindell a former security adviser to MPs, says parliamentarians will be being contacted to review their safety arrangements and encouraged to fill the "obvious gaps".

All MPs are offered "a full package of security" but not all take it, he says.

He says current arrangements will be reviewed "once the dust settles and we know more about the attack".

He adds it has long been recognised that MPs are "most vulnerable" at their constituency offices adding "the challenge is communicating that with every MP".

Here's how the emergency services responded in the initial aftermath of the attack on Sir David Amess.

An animal lover with a sense of fun and a tireless campaigner and supporter of many charities is how many are remembering Sir David.

These pictures reveal just a few of his many passions.

Firstly with journalist Ben Wright during the Parliamentary Pancake Race in 2015.

Image source, Getty

The 69-year-old was an MP who earned cross-party respect for the conviction he brought to his campaigns. They ranged from passionate support of Brexit to animal rights - and anything that brought Essex up in the world.

Image source, Getty Images

Image source, Getty Images

There are lots more pictures from throughout Sir David's life here.

As well as outside the church in Lea-on-Sea, tributes have been left outside Sir David Amess's local Conservative club and at Westminster.

Image source, Reuters

Image source, Reuters

Image source, Reuters

Tributes to Sir David have been made by lots of the people he worked with.

Roger Hirst, Police, Fire and Crime Commissioner for Essex has described him as a "true public servant".

"It was a sombre moment of reflection to remember a man who worked so hard for his community, who served those he represented passionately and made a real difference for Southend," Mr Hirst said.

"My heart goes out to his family and friends and also his constituents at this difficult time.

"As we try and come to terms with these tragic events it is important we remember the man he was and contribution he made."

Tory veteran Sir David was married with five children.

His killing comes five-and-a-half years after Labour MP Jo Cox was killed by a far-right extremist in her Batley and Spen constituency in West Yorkshire.

Image source, Essex Police

Residents of Leigh-on-Sea are to hold a candlelit vigil for Sir David this evening.

Organiser, Julie Everitt told the BBC he "was a much loved member of our community".

"He would go on campaigns, he was against the badger cull, he was against trophy hunting and fox hunting.

"I wrote to him on several occasions and he would always reply. He was a good gentleman, he had a good heart."

"(His death) has rocked our community here, we can’t believe it’s happened here.

"It’s an area that respected Sir David, whatever your political views were, because he was such a genuine, kind man."

The vigil is expected to start at 19:00BST at the recreation ground opposite the Belfairs Inn.

Most MPs do not get close protection while in their constituencies, but security was increased following Mrs Cox's killing in 2016.

All MPs were offered panic buttons, extra security lighting, additional locks and emergency fobs at their homes and constituency offices.

The spending on such measures increaded from £170,576 in 2015-16 to £4.5m two years later.

Jade Bottrill - a former member of staff for Labour MP Yvette Cooper - told the BBC she left her job due to the overwhelming number of death threats the office received.

She recalled the office being sent a “sympathy card for Yvette’s friends and family” with a message threatening to kill her.

“I became obsessed with finding death threats," says Ms Bottrill.

"I would finish work quite late, I would come home, have tea, go to bed and just lay in bed scrolling Facebook, finding and reporting death threats.

She said she would then go to sleep and "have this recurring nightmare" that Ms Cooper would be attacked.

Welsh MP Chris Elmore says he will attend his constituency surgery with "trepidation" in the aftermath of Sir David's death.

Speaking to the BBC, the Labour MP for Ogmore said there would be a police presence at his own surgery "for the first time in several years".

He says security was stepped up at his constituency office in Bridgend, and his home following the murder of Labour MP Jo Cox in 2016.

"It does play on your mind...but I am elected to serve my constituents, I'm elected to be accessible to my constituents.

"I don't think anything will happen, but it will rest heavy on my mind until I've finished the surgery."

Frank Gardner
BBC Security Correspondent

Whitehall officials say the suspect in custody was not on their database of SOI’s (Subjects of Interest).

They do not rule out the possibility that links to proscribed terror groups could later emerge from the forensic analysis of his phones.