Rather like Trump, I imagine

Not sure if The Sun is at all a reliable source, but it claims this:

SECURITY chiefs kept top secrets from Boris Johnson when he was Foreign Secretary over fears he couldn’t be trusted, The Sun has been told.

Intelligence bosses were “anxious” about sharing the most sensitive information with the frontrunner in the race for No10 during his two years in the Cabinet.

The nerves were sparked by at least two instances when Boris was accused of revealing classified information by mistake.

The order to cut him out came directly from PM Theresa May, The Sun has also been told.
“Pre-meetings” were held before key discussion forums such as the Government’s COBRA emergency committee that Boris attended for security chiefs to brief the PM on alone.

You would have to strongly suspect that intelligence delivery to Trump is also hedged - how on Earth could they trust the Tweeter in Chief completely??

The stories of Boris's incompetence and unreliability (and dis-likeability) are legion now.