Yes
No need for a visa, as the UK is a participant in the Visa Waiver Program.
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.
yes
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.
its natural u ned visa to travel from one country to another
No, individuals with a Schengen visa cannot enter the UK. The UK is not part of the Schengen Area, so a separate visa is required to enter the UK.
no
Yes
No, Serbian citizens doesn't need visa for Schengen countries, but they need visa for UK and Ireland.