Final answer:
Egypt is not in the same time zone as the United Kingdom as it operates on Eastern European Time, which is typically 2 hours ahead of GMT.
Step-by-step explanation:
The country that is not in the same time zone as the United Kingdom is Egypt. The United Kingdom typically operates on Greenwich Mean Time (GMT) or British Summer Time (BST) during daylight saving. On the other hand, Egypt operates on Eastern European Time (EET), which is typically 2 hours ahead of GMT. Mauritania and Liberia are both closer in proximity to the United Kingdom's time zone, with Mauritania using Greenwich Mean Time (GMT) and Liberia on Greenwich Mean Time (GMT) as well. Therefore, among the listed options, Egypt is the correct answer.