Under the terms of resulting Anglo-Irish Trade Agreement, all duties imposed during the previous five years were lifted but Ireland was still entitled to impose tariffs on British imports to protect new Irish "infant" industries. Ireland was to pay a one-off £10 million sum to the United Kingdom (as opposed to annual repayments of £250,000 over 47 more years). Arguably the most significant outcome, however, was the return of so-called "Treaty Ports", three ports in Ireland maintained by the UK as sovereign bases under the terms of the Anglo-Irish Treaty. The handover of these ports facilitated Irish neutrality during World War II, and made it much harder for Britain to ensure the safety of the Atlantic Conveys.