Theresa May has been put under renewed pressure to disclose whether she knew about the reported misfiring of a Trident missile last year.
According to The Sunday Times, a missile was test-fired from a British submarine in June 2016, aimed in the direction of Africa. But it reportedly veered off course, heading towards the US.
This incident happened merely weeks before the vote to renew Trident's budget by £40bn in July. MPs backed the renewal by 472 votes - as opposed to 117 votes in opposition to it.
When the Prime Minister appeared for an interview on the BBC with Andrew Marr, she declined to answer the question on this subject four times.
Meanwhile, Scottish First Minister Nicola Sturgeon called for "full disclosure", labeling it a very serious issue, and Labour leader Jeremy Corbyn said the reports called for "serious discussion."
The Sunday Times reported that Defence Secretary Michael Fallon will be expected to answer questions about the incident from MPs.