Israel and Hamas, announced the ceasefire earlier Thursday aimed to close 11 days of deadly fighting that pounded the Palestinian enclave and forced countless Israelis to seek shelter from rockets.
On China, which has been accused of repressing its minority Uyghur population and cracking down on rights in Hong Kong, and Russia, Raab said the "door was open" to better ties.
Like Russia, China also stands accused by Western intelligence of unleashing trolls on social media, and of using foreign-language arms of its state media to channel an aggressive line on issues such as the plight of Uyghurs in Xinjiang.
"The Myanmar military has sunk to a new low with the wanton killing of innocent people, including children," Raab said.
At least 538 civilians have been killed in the protests, 141 of them on Saturday, the bloodiest day of the unrest, according to the Assistance Association for Political Prisoners (AAPP).
"Today China enacted changes to Hong Kong's electoral system which are a clear breach of the Joint Declaration - undermining the freedoms of the people of Hong Kong and breaking Beijing's international obligations," Foreign Secretary Dominic Raab said.
"As a valued member of the UK family, we stand side by side with Gibraltar as we enter into the forthcoming negotiations with the EU on Gibraltar's future relationship," Raab said in a statement ahead of the talks with Gibraltar Chief Minister Fabian Picardo.
The British foreign ministry said it would target military-owned conglomerate Myanmar Economic Holdings Ltd, citing serious human rights violations against the Rohingya and its association with senior military figures.
"We fully support Bulgaria's efforts in disrupting an alleged spy ring and taking steps to tackle Russia's hostile actions in its territory," Britain's Foreign Secretary Dominic Raab said on Twitter on Saturday.
"I think it takes some explaining because the world's watching ... It also cuts across the direct assurances that we had from the Commission," Raab told.
"We expect those assurances and legal contracted supply to be respected. Frankly, I'm surprised we're having this conversation."
But Woodward, stressing the need for global coordination, told reporters: "This is of course the right thing to do but it is also in all countries' interest. No one is safe until all of us are safe."
He and the foreign ministers of Greece and Turkey are expected to attend a three-day summit the United Nations will call in early March on the future of Cypriot reunification talks.
*Failure to reach a settlement after so many efforts will benefit no-one, so I urge all sides to come to the talks with a willingness to demonstrate flexibility and compromise.