The British government is reported to be paying around 60 million US dollars for enhance border controls on French soil.

An agreement was signed, Macron said to enable the famous Bayeux Tapestry to leave France for the first time in almost 1,000 years on loan for exhibition in Britain in 2022.

"It is fragile and has never traveled abroad in nearly 1,000 years," said the president, adding: "Our shared history is reflected in the loan of the Bayeux." He said the loan forms part of a wider cultural exchange between Britain and France over the next four years.

May said the relationship between Britain and France has always gone beyond defense and security, saying both sides had agreed to build on existing ties.

"After Brexit we will remain steadfast allies. We are Europe's two foremost military powers. We've agreed that UK-France cooperation remains critical to European defense," added May.

Macron and May started a hectic working day with a lunch in a traditional 17th century pub before heading to Sandhurst where they inspected a guard of honor by the Coldstream Guards as the French national anthem rang out.

Downing Street said in a statement later that the two countries are the only European powers with the ability and political will to deploy and sustain significant military force.

Measures agreed between the two sides today include an agreement by Macron to further French support to the Britain-led enhanced Forward Presence battlegroup in Estonia.

Britain, meanwhile, agreed to deploy RAF Chinook helicopters to Mali to provide logistical support the French counter-terrorism mission.

A Britain-France Defense Ministerial Council is to be created as a permanent and regular forum in which defense cooperation can be discussed by the respective defense ministers.

There was also agreement on the two countries continuing defense research. Britain and France committed to working more closely on research and innovation across sectors including artificial intelligence, space and climate change.

Britain's Energy Minister Richard Harrington, meanwhile, signed an agreement for the two countries to work more closely on civil nuclear decommissioning.