It is collectively known as the Trident system.

John Reid voted for the replacement of the Trident system.

The current Trident system cost £12.6bn (at 1996 prices) and costs £280m a year to maintain.

Work on a potential replacement for the Trident system has begun, although no final decisions have been taken.

The Trident system received significant opposition during its development.

See British replacement of the Trident system for current debate on this issue.

The Opposition do not understand that we have to provide for the full life of the Trident system - for 30 years.

Members have recently protested against the British replacement of the Trident system.

One thing is absolutely certain - no one needs the Trident system to be put into use.

Today, we do not know how many ministers are questioning the plan to replace the existing Trident system.