The last time that I was in the Palace of Westminster, admittedly down (or up) at the Lords end, I wandered around entirely unimpeded even by the machine gun wielding policemen, who were really very pleasant.
I have never held a pass there. I was just in for a day conference. It wasn't particularly hard to get in, either. Easier than boarding an international flight, in fact.
Seema Malhotra needs to get over herself.