Important Coronavirus (COVID-19) travel
To prevent new COVID variants from entering the UK, you should not travel to amber or red list countries.
To understand the risks in a country follow FCDO Travel Advice.
When you return, follow the rules to enter the UK from abroad (except from Ireland).
You can withdraw cash using a UK card up to the daily limit imposed by the Greek banking system (usually €600) or the daily limit imposed by your UK card issuer - whichever is the lower amount.
You should be able to pay for retail transactions with debit and credit cards as you would elsewhere, but always check beforehand as not all business hold a machine for processing card payments.
When travelling outside the UK you should take more than one means of payment with you (cash, debit card, credit card).