There is "no assessment to substantiate" Israel's claim that Iran has long-range missiles capable of reaching London, a UK cabinet minister has said.
Housing Secretary Steve Reed told the BBC there was "no specific assessment that the Iranians are targeting the UK - or even could if they wanted to", after the Israel Defense Forces (IDF) said on Saturday that Tehran had weapons that could reach up to 4,000km (2,485 miles).
It comes after it emerged Iran targeted the joint US-UK military base on the Chagos Islands in the Indian Ocean, around 3,800km from Iran.
Reed refused to say how close the missiles came to the British territory, saying he could not share "operational details".
Iran fired two ballistic missiles at Diego Garcia - one of which failed and fell short, while the other was intercepted - overnight into Friday.
After news of the attempted attack emerged, the IDF said on Saturday that it had revealed last year that Tehran had intended to develop missiles capable of reaching Europe, Asia and Africa.
It added: "We have been saying it: The Iranian terrorist regime poses a global threat. Now, with missiles that can reach London, Paris or Berlin."
Asked whether this was true, Reed insisted that there was "no specific assessment that the Iranians are targeting the UK or even could, if they wanted to".
"We are perfectly capable of protecting this country and keeping this country safe, whether it's here at home, or whether it's our assets and nationals across the region," he told Sunday with Laura Kuenssberg.
Pressed again about the IDF's comments, he said: "There is no assessment to substantiate what's being said."
Even if Iran were able to launch strikes at such a range, the British armed forces would be able to defend the UK, he said.
The longest-range weapon in Iran's arsenal is thought to have a maximum range of 2,000km, far short of both Diego Garcia and London.
Reed's Conservative counterpart Sir James Cleverly told the programme that Iran was deploying "very, very long-range missiles", but would not be drawn on whether these were capable of hitting the UK as he was no longer privy to the intelligence reports he had received as foreign secretary.
Sir Richard Shirreff, a retired British Army general and former Nato commander, said Israel's claims about Iranian capabilities should be taken "seriously, but as seriously as the potential for Russian missiles to come this way as well".
"But I would also say that of course Israel is going to say this, because it is in Israel's interest to broaden the war, to bring as many nations in on this war," he told Broadcasting House on BBC Radio 4.
The UK government has only allowed British airbases to be used for strikes on sites targeting UK interests and allies in the region.
On Friday, it expanded targets under this "collective self-defence" justification to include Iranian sites being used to threaten vessels travelling through the Strait of Hormuz - a key shipping route through which a fifth of the world's oil flows.
Along with RAF Fairford in Gloucestershire, the UK has given the US permission to use Diego Garcia to conduct these bombing raids.
Reed denied the UK was seeking to escalate the war, adding it was "necessary to adapt to the new targets that the Iranians are focusing on".
