Mr Vassalo, the associate deputy director of national intelligence for mission integration, responded when asked by this newspaper if Brexit would impact the UK-US intelligence-sharing relationship.
“I think that operationally, tactically, the work that’s done in the field, the work that’s done back here, in terms of integrating across the allies and … partners, goes on,” Mr Vassalo said.
“I haven’t noticed any material change in any of that, and I wouldn’t expect to.”
The remark is likely to be welcomed by Eurosceptics who argue that the negative impacts of leaving the EU have been over-exaggerated by those wishing to remain a member of the bloc.
The UK-US intelligence relationship has not been without strains since Donald Trump took over the presidency in January 2017.