No they do not. Upon arrival, they are given a stamp allowing them to stay in the UK for not more than 6 months.
Yes
NO, in most cases you do not need a visa to come to the UK for a short visit
Yes, most non-UK citizens need a visa to enter the United Kingdom.
No UK citizens do not need a visa to go to Singapore just like Singaporeans do not need a visa to enter UK
Yes, you will need a visa to enter the UK if you are not a citizen of a country that is part of the European Union or European Economic Area.
no
Yes
No, Serbian citizens doesn't need visa for Schengen countries, but they need visa for UK and Ireland.
No - you still need a visa to enter the UK !
As of January 2021, EU citizens do need a visa to enter the UK for stays longer than 6 months. Short-term visits for tourism or business purposes do not require a visa, but longer stays do.
Yes they do.
Yes