Britain should install an Israeli-style ‘iron dome’ missile defence system, Penny Mordaunt has said in an unusual intervention highlighting concerns within government about the increasingly unstable geopolitical landscape.

Ms Mordaunt, the House of Commons leader and a former Royal Navy reservist, again called for an increase in defence spending, saying the government has a “duty to our citizens” to keep them protected as the world becomes less safe.

The former defence secretary’s comments come following another precarious week for relations between Israel and Iran.  Israel on Friday launched strikes on Iran that hit near military and nuclear targets deep inside the country, in retaliation for Tehran’s missile and drone attacks days earlier.

With war still raging in Ukraine and no end in sight to the conflict in Gaza, defence figures have been ramping up calls for the UK to bolster its defences, with one senior Conservative MP describing Iran’s strikes as a “wake-up call” for the West.

The UK currently spends just over 2 per cent of GDP on defence but there growing calls for this to be increased to at least 2.5 per cent, with some figures pushing for as much as 3 per cent.

Writing for The Sunday Telegraph, in a piece that may be interpreted as a pitch for the future leadership of her party, Ms Mordaunt said that the UK must be more ambitions about how much resources it puts into defence.

Leader of the House of Commons, Penny Mordaunt (PA Wire)

“To those that say about our defence ambitions ‘we can’t do, shouldn’t do or can’t afford to do’, I say ‘look to Israel’ – a nation a fraction of our size that has staved off an attack from a nation 10 times its size,” she told the paper.

“It has made a choice. It has made it work. We may not have its daily reminders of the threats we face, but we have the same duty to our citizens,” she added.

“Israel’s defence is our defence, and we must be ready to defend our allies the same way that we would defend ourselves, as we did last weekend.”

Iran fired more than 300 drones and missiles at Israel last week but nearly all of them were taken out, largely due to Israel’s formidable ‘irone dome’ system and support from its allies, including the UK, which eliminated targets over the skies of Iraq and Syrida under Operation Shader.

The iron dome, developed with backing from the US, specialises in shooting down short-range rockets. It has intercepted thousands of rockets since it was activated early in the last decade – including thousands of interceptions during the current war against Hamas and Hezbollah. Israel says it has a success rate of over 90 per cent.

A battery of Israel’s Iron Dome defense missile system (Copyright 2022 The Associated Press All rights reserved)

The iron dome is supported by ‘the arrow’ system, which is designed to intercept long-range missiles, including the types of ballistic missiles Iran said it launched against Israel.

The defence system is extremely expensive to maintain and operate. Reem Aminoach, a former brigadier general and chief financial adviser to the head of the Israeli military, told Bloomberg that it would have cost Israel around $1bn (£808m) to thwart Iran’s attack, with some intercepor missiles costing $3.5m (£2.8m) alone.

Jeremy Hunt, the UK chancellor, said he wanted defence spending to increase to 2.5 per cent after coming under pressure from colleagues to spend more money on protecting the UK against hostile states.

Labour has vowed to match this ambition and Sir Keir Starmer said in a recent visit to a shipyard in Barrow-in-Furness where submarines were being built that his party’s commitment to the UK’s nuclear weapons system was “unshakeable”.

All Nato members are signed up to an agreement to spend the equivalent of 2 per cent of GDP on defence annually although many did not match that level last year, according to estimates by the military alliance.

There have been calls for members to go above and beyond the 2.5 per cent figure amid Russia’s aggression in Ukraine.

Poland, which shares a border with Ukraine, was the top Nato spender last year, allocating 3.9 per cent to defence, with the US second on 3.5 per cent.

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