They established diplomatic relations in 1953, following Cambodia's independence from France.

The UK was the first country to condemn the human rights record in Cambodia in 1978.

The British embassy was opened in Phnom Penh in 1953 until March 1975, a month before the Khmer Rouge-takeover.

The United Kingdom is a significant contributor to the Extraordinary Chambers in the Courts of Cambodia.

The UK contributes to Cambodia around £10m per year, mainly to promote democratic reform, human rights and good governance, health, education, urban poverty projects, the development of rural livelihoods, and to tackle the growing problems of pedophilia, people trafficking, forestry crime, and the spread of HIV.