Whether or not the father must consent to your relocating the children to another country is something you will need to discuss with a lawyer in the U.K., as it's a matter of U.K. family law and the content of your U.K. custody order.
Whether or not the father must consent to your relocating the children to another country is something you will need to discuss with a lawyer in the U.K., as it's a matter of U.K. family law and the content of your U.K. custody order.