"William Hague makes me sick," said NHS worker Navid. "He gives a green light to Israel, just like he does to the regimes in Bahrain and Saudi Arabia."
Many protesters talked about the Arab revolutions. Walid, a student from west London, told Socialist Worker, "Hosni Mubarak is gone from Egypt. The new government knows that if Egyptian people don't like what it is doing, they will go back to Tahrir Square to change it."
Another protester, Sadia, said, "I hope that people in Palestine see our protest and see that people here care."
Meanwhile 1,000 protested in Edinburgh, and 300 in Manchester and Bristol. Some 200 demonstrated in Liverpool, Nottingham and Cardiff, 100 in Brighton and 30 in Bournemouth.
A group of around 50 students staged a walkout at Allerton Grange school in Leeds on Monday of this week. Another 50 began an occupation at the School of Oriental and African Studies in London. More marched across the world in Athens, Berlin and in cities across the US.
Si- n Ruddick
Uprising in Jordan
Protesters in Jordan are facing state brutality as they continue to call for the downfall of the Western-backed regime there.
The mostly young crowds threw rocks at security services in the second city of Irbid last week. One protester was killed on Thursday of last week during protests at a police station.
The demonstrators have taken up the battle cry of the Arab Spring, "The people demand the fall of the regime." Jordanian workers' unions staged a strike on Sunday to protest against the price rises, which could see the cost of household gas rise by 53 percent.
But protesters are also making the links to solidarity with Gaza. Many people have taken Palestinian flags to the protests. Across the Arab world people have taken to the streets in solidarity with Gaza.
In the Egyptian cities of Cairo and Alexandria, protesters held rallies calling on their government to support the Palestinians against Israel.
Palestinian flags were raised in refugee camps in Lebanon, and in the capital Beirut scores of people protested outside the UN. In Yemen mass protests after Friday prayers were held to support Palestine.