You need to contact the visa department of the British Embassy, in whichever country you reside in. If you need a visa, you will not be admitted without one.
https://www.gov.uk/general-visit-visa
How many more times are you going to keep asking the same questions, I think we may have a troll on our hands here
Of course fine.
You need a vald passport and whatever visa required for your trip purpose and for your citizenship.
Don't bother without the proper visa - you will be arrested and returned.
A sub machine gun should do the trick. I have friend in Britain called ibrahim. He get you one, very cheap???
