For US citizens, a visa is not required for tourist or business visits to the UK of less than six months in duration. Other citizens, please contact the UK Embassy or High Commission in your area or take the UK quick test (see related link below).
No need for a visa, as the UK is a participant in the Visa Waiver Program.
Yes
NO, in most cases you do not need a visa to come to the UK for a short visit
No UK citizens do not need a visa to go to Singapore just like Singaporeans do not need a visa to enter UK
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 !
Yes they do.
Yes
No - you can enter the UK for 90 days without a visa for tourist purposes
Did travel document refugee passport genever convetion 1951 NEED VISA FOR gibralter