1. ITV Report

MPs set to vote on £40 billion Trident renewal

Renewing Trident would cost the UK £40 billion Credit: PA

MPs are set to vote on Monday evening whether or not to renew Britain's £40 billion Trident nuclear deterrent.

Prime Minister Theresa May will urge MPs not to gamble with the safety of British families, adding that it would be "grossly irresponsible" not to back it.

The Labour party is expected to split on the issue, with the shadow cabinet calling on MPs to sustain but deputy leader Tom Watson and leadership candidate Owen Smith set to back Trident.

However, despite the opposition of the SNP and less than half of Labour MPs, the Government is expected to win the vote and renew the submarine deterrent.

Theresa May hopes MPs will vote in favour of renewal Credit: PA

Mrs May is expected to say that the global nuclear threat has "increased" rather than gone away in recent years.

It is impossible to say for certain that no extreme threats will emerge in the next 30 or 40 years to threaten our security and way of life.

And it would be a gross irresponsibility to lose the ability to meet such threats by discarding the ultimate insurance against those risks in the future.

Once nuclear weapons have been given up it is almost impossible to get them back - and the process of creating a new deterrent may take decades.

We cannot compromise on our national security.

We cannot outsource the grave responsibility we shoulder for keeping our people safe. And we cannot abandon our ultimate safeguard out of misplaced idealism.

That would be a reckless gamble: a gamble that would enfeeble our allies and embolden our enemies. A gamble with the safety and security of families in Britain that we must never be prepared to take.

– Theresa May

The Tories committed in their 2015 general election manifesto to replacing the Vanguard class of submarine which carries Trident missiles with four new successor class boats.

The Government says the latest estimate puts the cost of the four successor submarines at £31 billion over 20 years with a £10 billion contingency - on average 20p in every £100 the state spends.

A renewed Trident programme will be operational until the 2060s.