BRITAIN is considering pulling out of a £9 billion project with America to produce the new Joint Strike Fighter (JSF) aircraft, intended to fly off the Royal Navy’s forthcoming aircraft carriers.

The move is part of an increasingly desperate attempt to plug a £1.5 billion shortfall in the defence budget. The RAF’s 25 new Airbus A400 transport aircraft could also be at risk.

Studies have now been commissioned to analyse whether Eurofighters could be adapted to fly off the carriers.

If Britain abandons the JSF, it will be seen as a further snub to the Americans following Gordon Brown’s decision last week not to send 4,000 more troops to Afghanistan.

Only a week earlier, during a visit to London, Robert Gates, the American defence secretary, had said he understood Britain would be sending more troops to meet what commanders say is a 10,000 shortfall.

The possible ditching of the JSF results in part from spiralling costs that have seen the price of the planned 150 British aircraft rise from the original £9 billion estimate to £15 billion.

Britain has already paid out £2.5 billion in preliminary costs but next spring must start paying for actual aircraft. At that point it is committed to the entire project whatever the price.

Once full production begins, Britain will be paying more than £1 billion a year for the aircraft, exacerbating the already dire state of the Ministry of Defence (MoD) budget.

“That has really concentrated minds at the MoD,” said Francis Tusa, editor of Defence Analysis. “Put simply no-one has the faintest idea how much this project will cost.”

The cost is only part of the problem. There is serious concern over the aircraft’s lack of firepower as it can only carry three 500lb bombs, compared with as many as eight on the Eurofighter.

There is also increasing frustration over the continued American refusal to share information on the technology involved.

President George Bush signed a deal with Tony Blair shortly before the former prime minister handed over to Gordon Brown, promising to share top secret technology with Britain.

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