Why is the west of Britain wetter than the east?

Answer 1

because the east is nearer to the land than the west.

Answer 2

The prevailing westerly winds carry moist air from the Atlantic Ocean, which results in more rainfall on the western side of Britain. As the air rises over the western hills and mountains, it cools and releases moisture in the form of rain. In contrast, the eastern side of Britain is in a rain shadow effect, so it receives less precipitation due to the mountains blocking the incoming moisture.