According the US State Department's travel information web site, travel.state.gov, "A visa is not required for tourist or business visits to the UK of less than six months in duration." For other situations, see the web site for more information.
No need for a visa, as the UK is a participant in the Visa Waiver Program.
Yes the man from China will need a visa to visit the U.K.
yes
Yes
A Nigerian national who is living in, but is not a citizen of Poland, and does not have a Polish passport, will need to apply for a visa to visit the UK.
No. Since both UK and Czech Republic are EU members you do not need visa.
No.No.No.No.No.No.No.No.No.No.No.
Yes
Depends what your 'visit' is for really........if it is for work or education then yes you would need a visa. If your visit is purely as a tourist then no, you would qualify under the 'Visa Waiver' program and would be able to visit the UK for up to 6 months without a Visa
yes you need a visa
Yes, you generally need a visa to work in the UK if you are not a British citizen or a citizen of a country within the European Economic Area (EEA) or Switzerland.
I am a permanent UK resident holding indefenite visa. I would like to visit Schengen countries Do I need visa.