In the United States the answer is yes. In fact you can't be married to two people at once, even if you've had two ceremonies, because the second marriage would be invalid. However, deceiving a person by not telling them you're married and then marrying them is also against the law.
You can only be married to one person at a time.
No, a person cannot be legally married to two people at the same time in most countries as it is considered bigamy, which is illegal.
The same way you married them the first time. There are no different legal requirements for marrying the same person a second time than there were the first time you married that person.
yes it is different in every country there is a different miqat
The same person he is not married to.
No, it most countries in the world it is considered illegal. On the other hand, should you not mention the fact that you are already married then no-one will stop you.
The answer depends on the chronology and you haven't provided enough detail so consider the following:If you did not divorce after the first marriage then the second marriage was invalid.If the divorce was after the first marriage then your second marriage was valid and you are still married if you married the same person again.If both marriages to the same person were prior to the divorce then your marriage was legally dissolved.
All EU countries recognise UK marriages between a man and a woman but some do not recognise same sex marriages or partnerships. There will no need to get married again. The legalities of being married in terms of property and legal rights may also be different in the country you are thinking of moving to. You would need to check with the authorities of the country in question.
no same rules in all countries
In countries where polygamy is illegal, this person will be in federal/legal trouble.
NO
No. In Western countries you can only be married to one person at a time. In the United States, a man marrying two different women at the same time is a crime called "bigamy". The second marriage is legally void, but the attempt itself is criminal. "Polygamy" is the generic word for a situation when one man is married to more than one woman. The word for one woman marrying more than one man at once is "polyandry".
No, conjoined twins Brittany and Abby are not married to the same person. They each have their own separate lives and relationships.