this is 100% not the case
This, quite a few of them have guns.
What happened was the man was probably trying to crash into the gates to get in but he just ran people over and crashed before he could, my mum said something about both the car doors being open suggesting there was 2, on BBC they've said that there are 2 suspects, one who was shot dead and another person unknown who was of a different race.
I think that the police officer he stabbed wasn't qualified to get a gun but maybe not even a parliament officer, but my god is this scary, thoughts to the victims, their families and anyone involved.