ST. ANDREWS, Scotland (AP) — British Prime Minister Gordon Brown has called for serious consideration of a levy on financial activity to help insure the banking system from another crisis.

Addressing finance ministers and central bankers from the Group of 20 rich and developing nations on Saturday, Brown said Britain would not make such a move alone and that imposing any new tax or fee would have to be a global agreement — and complementary to existing action to stabilize the world economy.