The government has been accused of “spin and tinkering” over an announcement about an increase in defence spending which falls far short of what is needed, Sky News understands.

An entire fleet of military helicopters – the Royal Air Force’s Puma aircraft – was retired this week as part of a cost-saving plan to scrap older kit that was announced in November.

The sight of old but still airworthy helicopters being taken out of service before a replacement is ready – creating a capability gap – contrasts with statements by Rachel Reeves, the chancellor, and John Healey, the defence secretary, about boosting the defence budget.

Sir Ben Wallace, the longest-serving Conservative defence secretary, said he had expected better given the urgent need to rearm at a time of heightened threats and following Donald Trump’s warnings to Europe to stop relying on the United States to bankroll its security.

“We are at the dawn of a new era of insecurity across the world,” Sir Ben said.

“The US has warned us for a decade about not taking them for granted, and we all did nothing. In Germany, Poland, and France the penny has dropped and they have embraced a necessary culture change and re-prioritisation of government spend.

“In the UK, the government still thinks it is about spin and tinkering. It fools no one, and we risk losing our credibility and leadership on defence amongst allies.”

In her spring statement on Wednesday, the chancellor announced an extra £2.2bn for defence this coming financial year.

Ms Reeves told MPs it was a further “down payment” on a promise by the prime minister to lift expenditure on defence to 2.5% of GDP from April 2027. Defence spending is currently around 2.3% of gross national income. The new money will help inch it up to 2.36%.

The chancellor, defence secretary and prime minister have repeatedly phrased their plan to inject cash into the armed forces over this parliament as “the biggest sustained increase in defence spending since the end of the Cold War”.

But defence insiders say, while any new money is welcome, this claim is more spin than substance because the defence budget largely suffered repeated cuts since the Soviet Union collapsed.

Also, focusing on a slogan does not answer the question of whether an extra £2bn over the next 12 months is enough to transform the British Army, Royal Navy and Royal Air Force at the speed that is necessary, they said.

Asked whether it was sufficient, multiple military sources and a defence industry source collectively said “no”.

“This is just another sticking plaster that overlooks decades of underinvestment and chronic financial mismanagement of our armed forces,” the defence industry source said.

“Increasing spending or a focus on ‘novel technologies’ ignores the fact that we have let a broken system flourish.

“Time and time again, we see celebration over procuring outdated solutions while their manufacturers get away with significant delays or overspends with seemingly few repercussions.

“While we continue to spin and fight over tiny percentages of spending, we are allowing our armed forces to get hollowed out in front of us, hoping that government soundbites will provide the deterrence that our current equipment can’t.”

A military source said the additional £2.2bn for the year to March 2026 was a step in the right direction, but said it would merely keep defence on “life support”.

The situation only starts to improve marginally in two years’ time when the defence budget is finally forecast to hit 2.5% of GDP, the source said.

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This is despite the UK being a leading member of the “coalition of the willing”, with Sir Keir Starmer pledging to deploy forces to secure any ceasefire deal in Ukraine – a move that would put huge additional strain on his already stretched armed forces.

While the UK talks about 2.5% for the defence budget, Mark Rutte, the secretary general of NATO, says allies must spend more than 3%, while Mr Trump wants them to aim for 5%.

In 2020, Boris Johnson, as the prime minister, said a plan to increase the defence budget by £16bn over four years, on top of a commitment to lift defence spending by 0.5% above inflation for each year of the parliament – so what was described at the time as an additional £24bn in total – was the biggest boost to defence expenditure since the Cold War.

Sir Keir has added the word “sustained” when describing the size of his defence spending boost – though that will depend upon the accuracy of forecasts that GDP will expand at the rate predicted in the coming years.

Sir Ben said: “The UK is facing some of the highest threats in a generation, yet John Healey thinks spin is the appropriate response. He fools no one – not the men and women of the armed forces and not our enemies. I had expected better of him.”

UK stargazers were treated to a partial solar eclipse on Saturday morning, a phenomenon that sees the sun partially obscured by the moon.

Up to 40% of the sun was covered as the moon passed between the sun and Earth, partly obscuring the star.

Members of the public gathered to watch the spectacle in Greenwich while thousands more followed online.

“It’s a different way of experiencing the mechanics of the solar system for yourself,” said Catherine Muller, an astronomer at Royal Observatory to Sky News science correspondent Thomas Moore.

“We know about it theoretically, we know that the moon orbits the Earth and they might pass by us but really getting to see it in a new and different way is quite exciting for a lot of people.”

Looking directly at the sun is dangerous so astronomers used glasses, solar telescopes and pinhole cameras to watch the event.

The eclipse was visible across several other parts of the world, including western Europe, Greenland, north-west Africa and north-east North America.

For people in the southeast of England – where the weather meant the UK views were best – the peak of the eclipse was at around 11.03am.

At that point, around 30-40% of the sun was obscured, according to the Royal Observatory.

Northwest Scotland had the most coverage of the sun with 47.9% in Gallan Head, with Manchester getting 36.1% of coverage.

Dover had the least coverage of the sun with only 28.1%.

The next total solar eclipse is not for another 65 years in 2090, so Ms Muller recommends “making the most of the partial ones when they’re around”.

Spring sunshine will return to parts of the UK in time for Mother’s Day and continue into next week – potentially bringing the hottest day of the year so far, forecasters have said.

Sky weather producer Kirsty McCabe said Mothering Sunday was likely to be a “mostly fine day with bright or sunny spells once early low cloud and drizzle clears”.

She predicted there would be “temperatures near or above average” for most places.

Afterwards, however, high pressure is set to dominate. There is a good chance the highest temperature of the year so far will be reached by the middle of next week, topping the high of 21.3C (70F) recorded on 20 March.

Latest UK weather forecast

However, the far north and west of the British Isles are likely to be cloudier and windier with a risk of rain.

The Met Office has also forecast that warm conditions will return on Sunday after a brief, changeable period in what it called “typical spring fashion”.

Central and inland areas should have the warmest weather on Mother’s Day, with its forecasters also predicting “a short-lived spell of unsettled weather this weekend”.

But the Met Office added the country would “transition back towards a blocked weather pattern as high pressure builds on Sunday and dominates our weather through much of next week”.

Honor Criswick, a meteorologist from the agency, said the high pressure would “stick around as we head into next week, bringing some fine and settled conditions, perhaps even some warm sunshine”.

Partial solar eclipse in parts of UK

Ms Criswick said Sunday morning would be cloudy, with possible drizzle and mist, but that would give way to a dry day with “some sunny spells, particularly across central and inland areas of the UK”.

She predicted there would be “quite a settled start to the week next week, lots of sunny spells and also some quite warm temperatures”.

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Meanwhile, a partial solar eclipse will be visible in parts of the UK between 10am and noon on Saturday.

Those in the east of the country will have the best chance of seeing it.

The phenomenon occurs when the moon passes between the sun and the Earth. However, the three planetary bodies will not be completely aligned, meaning only part of the sun will be obscured this weekend.