Theresa May will confront Donald Trump over the stream of leaks of crucial intelligence about the Manchester bomb attack when she meets the US president at a Nato summit in Brussels on Thursday.

British officials were infuriated on Wednesday when the New York Times published forensic photographs of sophisticated bomb parts that UK authorities fear could complicate the expanding investigation into the lethal blast in which six further arrests have been made in the UK and two more in Libya.

It was the latest of a series of leaks to US journalists that appeared to come from inside the US intelligence community, passing on data that had been shared between the two countries as part of a long-standing security cooperation.

A senior Whitehall source said: “These images from inside the American system are clearly distressing to victims, their families and other members of the public. Protests have been lodged at every relevant level between the British authorities and our US counterparts. They are in no doubt about our huge strength of feeling on this issue. It is unacceptable.”