If this happened in the United States they would be conducting a postmortem on the pilot. I would hope that the security for Theresa May is good, but I doubt it.
That para-glider could have 100 lbs of high explosive on it.
When I worked at an Air National Guard base as a civilian security policeman a Secret Service agent took me to the top of the big hanger overlooking Air Force 2 and Marine 2 since I had the M-16 that shift instead of a revolver. He said “if you see something you don’t like, shoot it.” Thinking he was pulling my leg, I laughed. He said, “no, I’m serious. On my authority.” Okay. Whatever you say.
Easily.
My one and only ride as a passenger in an ultralight carried easily 300 pounds and it went up like an elevator in less than 80 feet.