Nick Clegg has said it is "shocking" and "an outrage" that innocent civilian lives have been lost at a UN school in Gaza.
The deputy prime minister says it suggests the military tactics used by the Israeli government are not proportionate and contributes to an "senseless cycle of violence".
There have been two days of quiet in Gaza. No rockets or missiles, no more destroyed houses, no more ambulance sirens screaming.
A three-year-old girl has been rescued from Gaza and brought to London for life-saving heart surgery.
A small team of NHS doctors and surgeons is travel to Gaza to set up facilities and establish how best to use specialists and equipment.