THE Tories have failed to make the case for the renewal of Trident, shadow defence secretary Emily Thornberry said yesterday before a once-in-a-generation vote on Britain’s nuclear weapons.

The government is fully signed-up to the replacement of four nuclear submarines despite the costs soaring to a staggering £205 billion.

David Cameron is expected to put the decision to Parliament this summer in a bid to reunite his party after the fractious EU referendum campaign.