Britain is now “directly involved” in the Ukraine war after its Storm Shadow missiles were used to strike targets inside Russia, according to Moscow’s ambassador.

Speaking to Sky News, Andrei Kelin also warned the West to carefully consider the lower bar Russia has established for using nuclear weapons.

It comes after Western allies green-lit Ukraine‘s use of long-range missiles to strike inside Russia this week, following months of requests.

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British Storm Shadow missiles were fired into Russia just days after President Biden authorised the same policy shift.

Russia’s President Putin responded on Thursday by saying Russia had tested a new intermediate-range missile in a strike on the Ukrainian city of Dnipro.

He warned it could also be used against military facilities of countries that allow Kyiv to use their own missiles.

“We believe that we have the right to use our weapons against military facilities of the countries that allow to use their weapons against our facilities,” Mr Putin said.

“And in case of escalation of aggressive actions, we will respond resolutely in a mirror way.”

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Analysis: How Ukraine will use UK missiles

The Russian ambassador told Sky News’ Mark Austin that Britain allowing Ukraine to use its missiles over the border had dragged the UK into the conflict.

“Absolutely, Britain and UK is now directly involved in this war, because this firing cannot happen without NATO staff, British staff as well,” said Mr Kelin.

He added: “The US administration, support by France and the UK, has made a deliberate decision to make these strikes, which seriously escalates the situation, and it can bring a collision between the nuclear powers.”

Mr Kelin called it “deliberate cheating of us” – claiming he had received multiple assurances the Storm Shadows would only be used inside Ukrainian territory.

What are Storm Shadow cruise missiles?

The air-to-air missile has a strike capability of more than 155 miles (250km) – meaning it would potentially allow Ukraine to hit further into Russian territory.

The missile weighs 1.3 tonnes and is just over 5m long.

It is launched from the air, and in theory can be used from Ukraine’s Soviet-made jets.

UK-owned Storm Shadow missiles are made in Stevenage by MBDA. Each cruise missile costs an estimated £2m.

The Storm Shadow was originally developed as a project between the UK and France in the mid 1990s.

It was used in Iraq in 2003, while France, Italy and the UK used it in Libya in 2011.

The missiles have also been used to bomb Islamic State targets in Syria and Iraq.

A 41 Sqaudron (the RAF's test and evaluation Sqn) Tornado GR4, preparing to test fire four Storm Shadow missiles over the Atlantic Ocean in 2014
Pic: Crown copyright
Image:
A 41 Squadron Tornado GR4, preparing to test fire four Storm Shadow missiles over the Atlantic Ocean in 2014. Pic: Crown copyright

Asked what the difference was between Ukraine using British missiles and Russia using Chinese, Iranian and North Korean equipment and manpower, Mr Kelin pointed to foreign fighters on the Ukrainian side.

“On that subject, I can say easily that we have plenty of mercenaries from different countries that are fighting right now on the side of Ukraine,” he said.

“We just have seen in the Kursk area of the Polish unit, which has a special uniform worn by Polish soldiers. So what’s the matter?”

In response to Mr Kelin’s comments, a Downing Street spokesperson said the government would not be “deterred or distracted by commentary from Vladimir Putin or the Russian ambassador”.

Until this week, Britain said its tanks, anti-tank missiles and other equipment could be used inside Russia, but had kept restrictions on long-range missiles – echoing America’s policy.

President Putin again raised the spectre of nuclear weapons this week when he approved changes that lower the threshold for such a strike.

Many have dismissed the move as empty sabre rattling, but Russia’s ambassador told Sky News he hoped the change “would be carefully considered by Western experts” as underestimating the risk of escalation is “dangerous”.

Putin threatens Western military facilities

Reports on Thursday suggested Russia may have fired an intercontinental ballistic missile (ICBM) at the Ukrainian city of Dnipro.

President Zelenskyy said the weapon used had the speed and altitude of a ICBM.

He added: “Today, our crazy neighbour has once again shown what he really is and how he despises dignity, freedom, and human life in general. He is so afraid that he is already using new missiles.”

An investigation is under way to confirm the type of missile, Mr Zelenskyy added.

A spokesperson for the British Prime Minister Sir Keir Starmer said reports of the missile’s use were “deeply concerning”.

In this photo provided by Ukraine's 24th Mechanised Brigade press service, servicemen of the 24th Mechanised Brigade fire 120mm mortar towards Russian positions near Chasiv Yar town, in Donetsk region, Ukraine, Tuesday, Nov. 19, 2024. (Oleg Petrasiuk/Ukrainian 24th Mechanised Brigade via AP) Submission Date:	Nov 21, 2024 08:12 (GMT)
Image:
Ukrainian troops fire a 120mm mortar towards Russian positions near Chasiv Yar town, in Donetsk region. Pic: AP

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However, in his TV address on Thursday evening, President Putin spoke of his forces using a new intermediate-range missile to hit a missile factory in Dnipro.

American officials also said their initial assessment was that the missile was an intermediate-range weapon.

In contrast, an ICBM can travel further – with a ranger greater than 3,500 miles (5,600km). They are generally used to deliver nuclear warheads but can carry other payloads.