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:

Fletcher says 14,000 babies will die in Gaza in the next 48 hours if aid supplies don't reach them.

Asked how the UN arrived at that figure, Fletcher says: "We have strong teams on the ground".

He says five aid lorries crossed on Monday, after Israel ended an 11-week blockade, but they haven't reached communities yet.

Fletcher says he hopes to get 100 lorries into Gaza today - adding that "we need to flood the Gaza Strip with humanitarian aid".

Reacting to an earlier statement from the UK, France, and Canada, which demanded Israel change course, Fletcher called it "robust words" - but said the "real test" is whether the UN can get more aid in,.

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".

(Source: BBC)