I found there was no central record to show occasions where covert baggage searches were carried out, but no seizures were made.
The absence of these records meant that no assurance could be provided to demonstrate that this power was being used in a lawful, proportionate and controlled manner.
More top news
Rescue workers are at the site Sunday morning trying to cut open mangled coaches.
Despite chilly temperatures it will be a mostly dry day, and milder than yesterday.
The Sunday Times alleges a missile malfunctioned after launch during a routine test of the UK's nuclear deterrent last year.