Diplomatic tensions escalate amid rows over planning hold-ups and collapse of spying trial

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Tensions between Britain and China have escalated after Beijing criticised further delays to a planning decision on its proposed “mega embassy” in London.

China’s ministry of foreign affairs expressed “grave concern and strong dissatisfaction” after Steve Reed, the housing secretary, pushed back his final decision on the proposal until 10 December.

The row further complicates attempts by Keir Starmer, the prime minister, to reset relations with Beijing, which have already been damaged by a row over alleged Chinese espionage in the UK.