A visa is not required for stays up to 45 days for British Passport holders entering Vietnam. Further advice should be sought from the applicable tourist authority for other nationalities and for general queries. Passports must have at least 6 months validity from your date of entry and a minimum of 2 blank pages. However, we strongly advise you check your destinations' Tourist Board or Embassy for the most up-to-date guidelines regarding passport validity.
Cambodia visa requirements
For land border crossing you will need to purchase a visa for Cambodia which can be purchased on arrival. The cost of this is approximately USD $37 per person, which will need to be paid in cash. Please note that you will need to have at least one completely blank page in your passport for the Cambodian visa to be issued.
You must also fill out an e-arrival card. All travellers must complete and submit online within 7 days prior to arrival. Details should be entered on this link https://arrival.gov.kh/ . Upon successful completion, you'll receive a unique QR code that must be presented at immigration upon arrival.