PRIME Minister David Cameron says we need Trident as a deterrent to ensure our security.

A deterrent is effective only if we are prepared to use it.

Is David Cameron really suggesting that we could use nuclear weapons against North Korea, thus contaminating our allies South Korea and Japan and the US bases there, or against Iran, contaminating the whole of the Middle East?

If he believes that nuclear weapons guarantee security, surely he must believe that every country in the world has a right to own them?

It's time we acted on the promise we made to abolish our nuclear weapons when we signed the Nuclear Non-Proliferation Treaty 43 years ago.

JENNY MAXWELL, Walford, Leintwardine.