Cambodia is in the list of countries and territories with approved COVID-19 proof of vaccination for travel to England.

More detail update and information please follow the link below:

https://www.gov.uk/guidance/countries-with-approved-covid-19-vaccination-programmes-and-proof-of-vaccination#countries-with-an-approved-proof-of-vaccination-and-examples-of-proof-required

Studying in London During the Global Pandemic
by Pheap Bunleang, MA in Social Media and Digital Communication @University of Westminster, UK