Secretary of state suggests July meeting of alliance will be fraught as US demands help in strait of Hormuz

Donald Trump is disappointed that Nato allies refused to become more actively involved in attacking Iran, the US secretary of state has said, setting up what could become a fraught summit of the alliance in July.

Marco Rubio, meeting with foreign ministers of the military alliance, emphasised that he expected the rift would be discussed at the July meeting in Ankara, making the summit “one of the more important” in Nato’s 77-year history.

British army is 80-90% short of drones as military exercise aims to build on European defence strategy

Deep in Charing Cross underground station, in the disused terminus of the Jubilee line, a secret Nato command bunker has this week been discreetly at work. Dozens of mostly British soldiers were engaged in a war game defending Estonia from a Russian invasion in 2030, unbeknownst to commuters and tourists bustling above.

The secret chambers are behind two sets of normally locked, metal double doors. A red glow at the bottom of the escalator beyond is the first sign of troops below; next are mocked up newspaper covers pasted over ageing adverts. A British Nato force has deployed to Estonia they blare, in response to a Russian massing of troops on the border.

UK calls incident ‘unacceptable’ after Su-27 jet comes within six metres of unarmed RAF plane over Black Sea

A Russian jet flew within six metres of an RAF spy plane flying at 500mph over the Black Sea, one of two mid-air incidents last month described as “dangerous and unacceptable” by the defence secretary, John Healey.

An Su-27 jet conducted six passes in front of an unarmed RAF Rivet Joint flying close to its nose in mid April, risking a collision that could have caused a diplomatic crisis between the two countries.

Attack marks first time military action has forced a fully operating nuclear power plant to rely on backup generators

• Middle East crisis – live updates

A drone strike that cut off external power to a nuclear reactor in the United Arab Emirates this week has revived concerns over the safety of nuclear plants during wartime.

Reactor no 3 at the Barakah nuclear plant lost vital off-site power for about 24 hours after the attack on Sunday, forcing it to rely on emergency diesel generators.