Tobias Ellwood: The Government has helped to let Iran, a rogue state, off the leash. It’s time to rein it back in.

We should have supported an extension to the conventional arms embargo at the United Nations in August – and must back sanctions.

Daniel Hannan: Does the army really still need tanks? Or the navy aircraft carriers? Or the rest of us, the Trident system?

Let’s have a no-holds-barred strategic review which asks how we can best defend our interests given the vertiginous acceleration of military technology.

Tom Tugendhat: It’s time for the Government to stand with its allies – and stand up to Iran

To do so would mean more than staying in step with Trump. For no US administration could accept being bound into a UN system without a veto.

Hugo de Burgh: We owe it to future generations of Brits to work with China

It is our third largest market – we must work with it if we are to help resolve global problems from the environment to nuclear proliferation.

The behaviours of the civil service

At the heart of the Rutnam row is its reservations not only about how the post-Brexit journey is being negotiated, but about taking it in the first place.

WATCH: Blackford: ‘We need to modernise our defence forces, Trident doesn’t play a part in that’

The SNP’s Westminster leader is asked whether scrapping the nuclear deterrent will be part of their price for putting Corbyn in Downing Street.

Garvan Walshe: How Trump’s blunders give Iran the chance for “nuclear breakout”

The United States’ weakened capabilities and frayed alliances both play in Tehran’s favour at a crucial and sensitive time.

WATCH: May defends Britain’s position as a ‘tier one’ military power

“We will continue to be a leading member of NATO, we will continue to be a leading defence nation, and we will continue to contribute in a whole variety of ways across nuclear, cyber, and conventional capabilities.”

WATCH: Jong-Un’s face – as Trump tells photographers that both men want to look “nice and handsome and thin”

“Very nice…getting a good picture, everybody?…thank you,” the American President concludes.

WATCH: That Trump & Jong-Un handshake

A few small steps for both men, a giant leap for nuclear disarmament and international engagement?

Daniel Kawczynski: We must back Trump’s withdrawal of support from the Iran deal

Obama and his partners ignored the loudly-voiced concerns of our key Gulf strategic partners and Israel that the deal ignored potential Iranian interference in the region.

WATCH: Trump announces that America will withdraw from the Iran deal

“In just a short period of time, the world’s leading state sponsor of terror will be on the cusp of acquiring the world’s most dangerous weapon.”

Garvan Walshe: The IDF’s chief of staff thinks the Iran deal is good enough. Why doesn’t Netanyahu?

The Israeli Prime Minister senses a chance to finally succeed in his years-long campaign to persuade the United States to bomb Iran’s nuclear programme.

Garvan Walshe: The US Congress should stick with the Iran Deal

The deal won’t stop Iran’s nuclear programme for good, but it is still better than alternative, military means of non-proliferation.

Nadhim Zahawi: Our Government should make it clear that Trump is on his own over Iran

The President himself hasn’t set out what he would like to happen next, and has provided no detailed plan for what would replace the current agreement.