David Cameron has called for an "unconditional, immediate, humanitarian ceasefire" in Gaza to bring a halt to more than three weeks of violence which has claimed the lives of about 1,100 Palestinians and 55 Israelis.
Speaking during a visit to Slough, Berkshire, Mr Cameron said: "What we're seeing is absolutely heartbreaking in terms of the loss of life.
"The pictures that everyone has seen on their television screen are really heart-rending and everyone wants to see this stopped, so an immediate unconditional ceasefire, that is what is required."
The Prime Minister made clear that he blames Hamas, the political movement which controls Gaza, for the outbreak of the current rounding of fighting, saying: "Hamas must stop attacking Israel with rocket attacks. That is how this started. It's completely unjustified and they need to stop as part of the ceasefire."