The sharing of intelligence was reportedly going to be a complicated point of negotiation in Brexit talks even prior to the suicide bombing at Manchester Arena.
While families endure bereavement for loved ones, many of whom were children, one would expect there to be unanimous consensus on cooperation to catch those responsible; however, the issue is apparently less cut and dry.
The sharing of intelligence is among the most delicate facets of counterterrorism efforts for any government.
Officials emphasize that cooperation improved after the Brussels and Paris attacks but that there remain misgivings about sharing intelligence throughout the European Union and with other countries.
Brexit has only further complicated the issue.
E.U.Home Affairs Commissioner Dimitris Avramopoulos complained at a security conference in Munich held back in February that "we are still not sharing enough when it comes to information and intelligence."
Britain and other countries would still rather share sensitive information bilaterally at most in light of anxiety over how to control the flow of said information.
"It could be counterproductive," a Northern European, E.U.diplomat said, "to share some intel because it could endanger the source."
Brexit negotiations are only that much more difficult after the suicide bombing at Manchester Arena, and Theresa May has prioritized security and defense cooperation.
"In security terms a failure to reach agreement would mean our cooperation in the fight against crime and terrorism would be weakened," May wrote.