US Air Force bombers, capable of delivering up to 34 tonnes of explosives, are reportedly en route to the UK, fueling speculation that President Donald Trump is about to initiate a large-scale assault on Iran.

RAF Fairford in Gloucestershire is reportedly gearing up to receive a fleet of B-1 bombers arriving from Dyess Air Force Base in Texas.

This morning, a C-5M Super Galaxy transport aircraft filed a flight plan between the two bases, marking the first sign of US bombers being stationed in the UK since the conflict in Iran erupted last weekend.

The situation intensified today as the US and Israel conducted significant airstrikes on both Tehran and Lebanon.

Insiders now suggest that a massive offensive could take place on Saturday, exactly one week after the initial US and Israeli attacks on Iran, part of the operation known as ‘Epic Fury.’

This week, President Trump issued a warning to Iran, stating that the ‘big one’ was imminent and remarked, ‘We haven’t even started hitting them hard. The big wave has not even happened yet.’

And US defence secretary Pete Hegseth said overnight that America will now use British RAF bases to ‘dramatically’ up its strikes on Iran after the Prime Minister allowed the Americans to launch defensive strikes from UK-US bases.

‘When we say more to come, it’s more fighter squadrons, it’s more capabilities, it’s more defensive capabilities, and it’s more bomber pulses more frequently’, Mr Hegseth said.

A C-5M Super Galaxy transport aircraft filed a flight plan between the two bases this morning, providing the first indication that US bombers are being deployed to the UK since the outbreak of the war in Iran last weekend

RAF Fairford in Gloucestershire is understood to be preparing for a fleet of B-1 aircraft that are travelling from the Dyess Air Force Base in Texas (file photo) 

Central Tehran was rocked by a huge explosion this morning as the US-Israeli alliance dropped a huge payload on the Moqaddad base of the Revolutionary Guards’ 

B-1 aircraft, which are based at Dyess in Texas, can carry out long-range missions without detection while carrying the world’s most devastating missiles. 

They are the backbone of America’s long-range bomber force and according to the US Air Force can ‘rapidly deliver massive quantities of precision and non-precision weapons against any adversary, anywhere in the world, at any time’.

‘The B-1 is a highly versatile, multi-mission weapon system,’ an explainer on the force’s website reads. 

‘The B-1B’s synthetic aperture radar is capable of tracking, targeting and engaging moving vehicles as well as self-targeting and terrain-following modes.’ 

A temporary Transponder Mandatory Zone (TMZ), which requires aircraft to switch their transponders on in that area for better safety has been installed around RAF Fairford. 

It is expected to last a month and came into force at 3pm this afternoon. 

The Ministry of Defence declined to comment on the US aircraft’s movements when approached by the Daily Mail.   

Experts believe some US bombers could drop the ‘Mother of All Bombs’, a 10-tonne explosive that creates 1,000ft holes in the ground, taking out tunnels and bunkers while simultaneously pulling infrastructures such as bridges down into the giant crater.

Last night, President Trump warned the Iranian soldiers to ‘surrender or die’ after US raids took out Ayatollah Ali Khamenei and much of his military leadership.

Trucks with Class 1.1 explosive hazard warning symbols arrive at RAF Fairford today 

And today central Tehran was hit with one of the biggest explosions of the war so far on Friday.

There were deafening bangs and multiple plumes of smoke and fireballs as a huge payload hit the Moqaddad base of the Revolutionary Guards. Tehran’s famous Azadi Tower can be seen in the centre of a video as the bombs rained down on the Iranian capital.

Debris was thrown across the city centre and some witnesses even claimed have seen bodies thrown up more than 100ft in the air.

Military experts appear to agree that Trump’s ‘big one’ points to an escalation in US bombing sorties over Iran in the next 24 to 48 hours – and also dropping America’s biggest bombs.

America’s army of Reaper drones carrying thousands of pounds of laser-guided bombs to carry our precision strikes will also increase sorties over Iranian cities. While Attacks from air craft carriers and missiles from US submarines are also expected.

As Trump laid into Sir Keir Starmer for delaying access to UK military runways around the world, including in Diego Garcia, Mr Hegseth said last night: ‘We got there’.

‘The amount of firepower over Iran and over Tehran is about to surge dramatically,’ Mr Hegseth warned.

The United States may choose to drop its largest non-nuclear weapon in the coming days and weeks.

It is known as the ‘Mother Of All Bombs’ – a play on ‘MOAB,’ an acronym that stands for ‘Massive Ordnance Air Burst.’

A crater left by the blast is believed to be more than 100ft wide. Anyone at the blast site is vaporised.

It has not been deployed in Iran having been used in Afghanistan in 2017.

The damaged Presidential complex in Tehran where the US managed to kill Ayatollah Ali Khamenei

President Trump has long told reporters at the White House how ‘very proud’ he is of it.

American B-2 bombers did drop similarly destructive GBU-57 bunker-busters on Iranian uranium enrichment sites in June 2025.

The MOAB causes surface-level, wide-area destruction, while the GBU-57 burrows deep into the earth before exploding.

Military experts have said that the ‘big one’ Trump has warned Iran will use America’s most destructive arsenal – and appears imminent.

Sascha Bruchmann, a research fellow for defence at the office of the International Institute for Strategic Studies (IISS) in Bahrain, told the Daily Telegraph: ‘The big one is a sustained bombing campaign via the strategic bomber fleet, so the B-1s, the B-2s and the B-52s.

‘Last night, Centcom [US Central Command] said there was one B-1 bomber, and the night before there were four B-2s, who dropped heavier payloads, so 1,000 to 2,000lb bombs with some bunker-busting capabilities against those missile cities.

‘Now that there’s air dominance achieved, and we’ve seen US Reaper drones over cities, which you wouldn’t have if there were some kind of air defences’.

Iain Ballantyne, editor of Warships International Fleet Review magazine, told the newspaper: ‘The most obvious thing that President Trump may mean by “the big one” is some kind of MOAB – the “Mother of All Bombs”.’

He added that these terrifying air attacks would be ‘co-ordinated with the US navy unleashing not only the USS Gerald R. Ford but also the USS Abraham Lincoln carrier strike groups – both Tomahawk [missiles] from their destroyers and air wings – along with possible bombardments by submarines’.