READ MORE: Parking restrictions could be coming to Oxford road“As Speaker, I take the security of this house incredibly seriously. I believe this leaves the door open to foreign actors trying to spy on the House,” Sir Lindsay said. We must pursue all avenues to ­ensure the protection of members and people that work within the House of Commons. He said the Crown Prosecution Service (CPS), which he leads, had determined the case had to be stopped because of “an evidential failure”. “Accordingly, the reason that this case had to be stopped was due to an evidential failure.