More now from UK Prime Minister Keir Starmer, who says the UK and their French and Canadian allies are “horrified by the escalation from Israel”.
Speaking in the House of Commons, he repeats the government’s demand for a ceasefire as the “only way to free the hostages” and says that humanitarian assistance to Gazans must be scaled up.
The prime minister adds that the amount of food allowed into the Strip by Israel in recent days has been “totally and utterly inadequate”.
“This war has gone on too long,” he says. "We cannot allow the people of Gaza to starve”.
UK Prime Minister Keir Starmer says he is "horrified by the escalation from Israel".
He is currently speaking in the House of Commons - we'll bring you more of his comments shortly.
Alice Cuddy
Reporting from Jerusalem
I’ve been speaking over WhatsApp to a doctor at the first UK-funded field hospital in Gaza.
The medical coordinator for the British aid organisation UK-Med tells me that over the past few days there have been “an increase in the number of explosive injuries” at the field hospital in al-Mawasi, in the south of Gaza.
“Our orthopaedic surgeons have been operating on fractures and shrapnel injuries, and some people have had injuries resulting in limb amputation. Unfortunately in mass casualty events we have received people, including children, who died from their injuries before arriving at our field hospital,” she says.
The doctor adds that three babies were delivered at the facility yesterday - two by emergency C-section.
“Today our paediatric ward is filled mainly with children recovering from surgery, but also some with respiratory infections as a result of living in overcrowded conditions in tents. Lack of access to clean water and soap mean that we see a lot of children with skin abscesses that require surgery to drain the infection,” she says.
Tomorrow, the field hospital will run an outpatient clinic aimed at treating children and breastfeeding women suffering from malnutrition.
As we've been reporting, the UN says it has been given permission by Israel to send "around 100" trucks of aid into Gaza today.
That comes after a series of overnight Israeli strikes across the Gaza Strip. Here are some of the latest pictures from inside Gaza:
Image source, Anadolu via Getty ImagesThis school in Gaza City, where hundreds were sheltering, was one location hit by Israeli attacks overnight
Image source, Anadolu via Getty ImagesResidential areas have been destroyed by the continuous Israeli offensive, as seen here in Beit Lahia and Beit Hanoun
Image source, Anadolu via Getty ImagesThese Palestinians sit on the streets with their possessions piled up behind them
Image source, Anadolu via Getty ImagesThese people have their belongings piled on a trailer, as they leave Khan Younis to head towards al-Mawasi
Laerke was also asked about comments from the UN's humanitarian chief, who earlier told the BBC that 14,000 babies would die in the next 48 hours if aid fails to reach them.
Speaking to reporters, he says: “For now let me just say that we know for a fact that there are babies who are in urgent life-saving need of these supplements that need to come in because their mothers are unable to feed themselves.
"And if they do not get those, they will be in mortal danger," he says.
"That is as much as I can say right now. If we have more specifics, we’ll go back to you on that.”
More now from Jens Laerke, spokesman for UN Office for Coordination for Humanitarian Affairs (OCHA).
Earlier we reported him saying that the UN has been given permission to send "around 100" aid trucks into Gaza.
Speaking to reporters, Laerke says nine trucks were cleared for entry yesterday, but only five of them crossed into Gaza.
"For logistical reasons, four of them were not able to enter," he adds. "The crossing has different stages and there is a repacking, if you like, from one set of trucks to another set of trucks before it can move in.
"The last level where the five trucks entered, are still under Israeli control, and we need permission to pick it up. That did not happen yesterday."
He adds that this morning, they do have permission to collect those five trucks and others that may enter today.
BBC World Service's Newsday programme has spoken to a British doctor volunteering at Nasser Medical Complex in Khan Younis, where a warehouse containing medical supplies at the hospital was hit by an Israeli strike yesterday.
The five lorries of aid allowed into Gaza yesterday are not enough, Graeme Groom says, and that "several hundred trucks" are needed.
The doctor says he treated several casualties from the blast, including a man whose legs had to be amputated. Groom says he managed to help the man but "the rest of his family died".
“That is the additional layer of horror to the situations of the people we treat,” he tells the BBC.
He also mentions a 10-year-old boy, who he says has only one brother left, after the rest of his family died.
"We hear him calling for his mother, who is dead," he says.
The United Nations says it's been given permission to send "around 100" aid trucks into Gaza.
It comes after warnings from the UN's humanitarian chief that 14,000 babies could die over the next 48 hours if aid supplies don't reach them.
Speaking to the BBC earlier, Tom Fletcher said five lorries were allowed in yesterday following an 11-week blockade, and hoped for more today.
Jeremy Bowen
International editor
Israel went to war after the Hamas attacks of 7 October 2023 armed with an arsenal of weapons mostly paid for, supplied and then resupplied by the United States.
Its other allies gave Israel something just as potent in its own way: a deep credit of goodwill and solidarity, based on revulsion at the killings of 1,200 people, mostly Israeli civilians, and the sight of 251 people being dragged into captivity in Gaza as hostages.
Now it seems that Israel's credit has gone, at least as far as , the United Kingdom and Canada are concerned. They have issued their strongest condemnation yet of the way Israel is fighting the war in Gaza.
Israel, they say, must halt its new offensive, which Prime Minister Benjamin Netanyahu says will destroy Hamas, rescue the remaining hostages and put all of Gaza under direct Israeli military control.
Dr Ibrahim al-Ashi is a dentist who works at a small medical point set up next to a community kitchen run by Gaza Soup Kitchen, an organisation that provides meals in Beit Lahia.
“What is happening here is beyond anything that I have seen or imagined,” he tells BBC Radio 4's Today programme.
He says he witnessed a recent Israeli attack in the vicinity of the Indonesian hospital which is located in Beit Lahia.
“I saw the patients being evacuated under fire," he says, adding that patients were still lying in their beds and "some were still bleeding".
“Medical staff were doing their best, carrying people through the shells. But they had no ambulances – nothing but their hands.”
On Sunday, Gaza’s Hamas-run health ministry said the Indonesian hospital had ceased work because of Israeli fire.
The Israeli military said its forces had targeted “terrorist infrastructure sites” in northern Gaza, including an area adjacent to the Indonesian hospital.
As we've been reporting this morning, the UN's humanitarian chief says only five trucks of aid went into Gaza on Monday, and he is hoping 100 will be able to enter today.
That's a stark difference compared to how much aid was entering Gaza pre-war - an average of 500 trucks per day - as this graphic shows.
Alice Cuddy
Reporting from Jerusalem
International journalists, including the BBC, are blocked by Israel from entering Gaza independently, so much of our communication with people there happens over phone calls and messages.
Overnight, I received more WhatsApp messages from a man in al-Mawasi, in southern Gaza, where the Israeli military has been directing people under evacuation orders to move for safety.
“People do not know where to pitch their tents” because of the number of people there, Abd al-Fatah Hussein says.
He adds that tents people are staying in are “tattered” and offer little “protection from the summer heat”.
When asked about the entry of aid to Gaza yesterday, he says that the quantity “was not sufficient to supply even a single displacement camp for one day”.
As a reminder, Israel said it would allow aid into Gaza, ending an 11-week blockade, but the United Nations has said the five trucks allowed in on Monday is not nearly enough.
The BBC's international editor, Jeremy Bowen, is answering questions from listeners now with BBC Radio 5 Live's Nicky Campbell.
You can listen live by pressing the button at the top of the page.
Alice Cuddy
Reporting from Jerusalem
Palestinians in northern Gaza are telling the BBC about their struggles to find food - and their concerns that the limited aid now being allowed in will not reach them.
(Earlier, the UN's Tom Fletcher told us that only five aid lorries had entered Gaza since Israel eased the blockade on Monday).
"We can’t find a piece of bread to feed our children… how will we get aid from the south? It will be difficult for us to go there. We are living in a tragedy," one man in Gaza City says.
"People started fainting from the lack of food and hunger. We don’t know what to feed our children. Neither lentils, rice or flour are available, or any other type of food. Vegetables are not available. No one can afford to buy one tomato. No one can buy a bag of flour."
Another man, Abu Salem, is desperate for "basic [supplies] like oil, sugar and gas".
"We need food for the children," he says.
Image source, ReutersPalestinians at the site of an Israeli air strike in Gaza City on Tuesday
On Monday, Israel's Prime Minister Benjamin Netanyahu said the decision to let in a "minimal" amount of aid, following 11 weeks of blockading Gaza, followed pressure from allies.
"We must not reach a situation of famine, both from a practical and a diplomatic standpoint," Netanyahu said.
He added that Israel's "greatest friends in the world" had voiced concern about "images of mass hunger".
Israel says the blockade is designed to put pressure on Hamas, which is still holding 58 hostages - up to 23 of whom are believed to be alive
Israel accuses Hamas of misusing and stealing aid - something Hamas denies.
Netanyahu says until Israel can establish "a sterile area under IDF control for distributing food and medicine" they will only allow a "minimal, basic bridge" to prevent hunger.
Image source, ReutersAid lorries for Gaza pictured in Egypt on Monday
Image source, EPATom Fletcher, pictured in December
We've just heard from Tom Fletcher, the UN's under-secretary-general for humanitarian affairs, who spoke to Anna Foster on Radio 4's Today Programme. Here are the key lines:
The BBC's Anna Foster asks Tom Fletcher how the UN works out that 14,000 babies may die within the next 48 hours without more aid.
He says "we have strong teams on the ground - and of course many of them have been killed".
But he says "we he still have lots of people on the ground - they're at the medical centres, they're at the schools...trying to assess needs".
Fletcher now repeats that 14,000 babies could die in 48 hours, if aid doesn't reach them.
"I want to save as many as these 14,000 babies as we can in the next 48 hours," he says.
He stresses that "we need to flood the Gaza Strip with humanitarian aid".
When the Today programme's Anna Foster says that 14,000 figure is "an extraordinary figure", Fletcher replies that is is an "utterly chilling" figure.
"But this is what we do, we keep going. It will be frustrating, we will be impeded and run huge risks. But I don't see a better idea than getting that baby food in," he says.
After five aid lorries crossed on Monday, Fletcher hopes to get 100 trucks across the border into Gaza today.
"It'll be tough," he says, noting that they get "impeded" at every point.
"But we'll load those up with baby food and our people will run those risks," Fletcher says.
Fletcher now says five trucks of aid went into Gaza on Monday, but repeats that it's a "drop in the ocean".
He says, although the aid lorries have crossed into Gaza, they are just on the other side of the border, and haven't even reached the communities yet.
Fletcher says the supplies on the trucks are "baby food and nutrition".
He fears that 14,000 babies will die in the next 48 hours if the supplies don't reach them.