A man walks at a park in central London, Britain, March 7, 2022. (Xinhua/Li Ying)

Buses run past a lawn outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

A bus runs past a lawn outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

People walk past a park in central London, Britain, March 7, 2022. (Xinhua/Li Ying)

Flowers are seen outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

Flowers are seen outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

Flowers are seen outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

A worker mows the lawn outside Westminster Abbey in London, Britain, March 7, 2022. (Xinhua/Li Ying)

Flowers are seen at a park in central London, Britain, March 7, 2022. (Xinhua/Li Ying)