The United Nations human rights office has voiced deep concern at the Thai army coup and said that martial law and military orders being imposed may infringe on fundamental freedoms.
"We remind the authorities of Thailand's obligations under international human rights law, which strictly limit the application of emergency powers, said UN human rights spokeswoman Ravina Shamdasani said.
"We urge the authorities to take all necessary measures to ensure the fundamental human rights are respected."
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The Office for National Statistics said gross domestic product grew by just 0.1%.
William's comments came during a surprise appearance at an event scheduled for just his brother.
Matt Campbell, who collapsed just a few miles from the finish line, had hoped to raise £2,500.