PARIS (Reuters) - France and Germany unveiled plans on Thursday to develop a European fighter jet, burying past rivalries as part of a raft of measures to tighten defense and security cooperation.

French President Emmanuel Macron and German Chancellor Angela Merkel attend a news conference following a Franco-German joint cabinet meeting at the Elysee Palace in Paris, France, July 13, 2017. REUTERS/Stephane Mahe

The move to develop a new warplane accelerates steps that are expected to shape the future of the European fighter industry and its three existing programs - the Eurofighter, France’s Rafale and Sweden’s Gripen.

The move also reflects efforts to give fresh impetus to Franco-German relations in the aftermath of Britain’s decision to leave the European Union and was described by defense experts as a snub to Europe’s leading military power..

France and Germany aim to come up with a roadmap by mid 2018 for jointly leading development of the new aircraft to replace their existing fleets of rival warplanes, according to a document issued after a Franco-German cabinet meeting in Paris.

“Today there are too many European standards and qualifications and sometimes there is competition among Europeans internationally,” French President Emmanuel Macron told a news conference, flanked by German Chancellor Angela Merkel.

“I can confirm this is a deep revolution but we are not afraid when they are carried out peacefully, in a structured way and over time,” Macron said.

France and Germany said their new combat system, which analysts say could involve a mixture of manned and unmanned aircraft, would replace the Rafale and Eurofighter, rival jets that compete fiercely for global sales.

That would mark the end of a decades-long split since France withdrew from the Eurofighter project in the 1980s to produce its Rafale warplane with Dassault Aviation.

Defense industry experts called the move a setback to Britain and its leading arms contractor, BAE Systems.

“It is a sign to the British. It means ‘you are leaving the EU and we are driving forward. We are no longer interested in you blocking the EU on defense’,” a senior German defense industry official told Reuters.

BRITAIN OUT ON A LIMB?

The joint declaration did not say what role, if any, Britain would play in the Franco-German-led development. The country is Europe’s biggest defense spender and a partner in the Eurofighter project alongside Germany, Spain and Italy.

France and the United Kingdom - both permanent U.N. Security Council members with close defense and security ties - agreed to cooperate on nuclear and missiles technology in 2010, but some French officials have expressed concerns about the impact of Brexit on defense.

Some analysts and defense officials said the Franco-German push to create a new fighter could drive Britain further toward industrial and defense cooperation with the United States.

Currently, Britain has a foot in both camps through the Lockheed Martin F-35 and a share of the Eurofighter program through BAE.

“It is almost inevitable that the UK would consider a new partnership with America for the next generation of fighters,” said Alexandra Ashbourne-Walmsley, associate fellow at the Royal United Services Institute, a think-tank based in London.

“The UK has accepted that it can’t build another fighter on its own, both as a natural evolution from the F-35 program and also because of economies of scale since having a small part of a U.S. project is worth more than a Franco-German program.”

However, Thursday’s declaration is also seen by some as just the opening move in a long and unpredictable European negotiation affecting defense firms including BAE and its Eurofighter partners Airbus and Leonardo.

Paris and Berlin also agreed to set up a cooperation framework for the next model of the Airbus Tiger attack helicopter and for tactical air-to-ground missiles.

In addition, they will work together on procuring ground systems including heavy tanks and artillery and said a contract was expected to be signed before 2019 for the military “Eurodrone” project, which also includes Italy.