Great Britain's Longest River

The Question:

Could you please settle a disagreement. My friend says that the Tay river in Scotland is the longest river in Great Britain; I say it is the Severn. Please forward me the correct answer.

The Answer:

The longest river in Great Britain (which includes England, Scotland, and Wales) is the Severn. The Tay is Scotland's longest river. So you are correct.

-The Fact Monster