The "United Nations" would be the best list in terms of an organization dedicated to keeping the peace and protecting human rights, but it should be noted that the International Monetary Fund does a little bit if this in its own way as well.
Ummm ... what are you trying to say ?
ANSWER: River Severn and river Thames also river Tay.
Explanation: the longest river in the UK is river Severn which flows through England.
