The UK Foreign Office has declared support for the "Crimea Declaration" adopted by the U.S. State Department and issued on July 25, according to a report posted on the website of the British government.

"The UK echoes the United States' firm statement of opposition to Russia's illegal annexation of Crimea. The UK position is clear: we condemn Russia's continued breach of international law; Crimea is Ukrainian territory. We remain fully committed to upholding the sovereignty and territorial integrity of Ukraine within its internationally recognized borders," a Foreign Office spokesperson said.

The office also stressed the systematic persecution of minority groups and of those who voice their opposition to Russia's illegal annexation of the territory continues in Crimea.

"We call again for Russia to release all Ukrainian political prisoners held in Crimea and in Russia, and to allow unrestrained access for international human rights monitoring bodies to the peninsula," reads the statement.