The speaker of the House of Commons has reassured MPs that data held on Parliament's computers were not accessed by police during raids on the Tory immigration spokesman's office at the Commons.
The speaker said if the Parliamentary Information Communication and Technology Service (PICTS) received a request for access to computer systems it will seek confirmation that a warrant exists and that the speaker has approved of access.
John Pugh said he already uses his own secure link to his computer system from the House of Commons to ensure confidential information is safe.
He said: "I have no reason to believe that any information has been illegally accessed I just assume there is this possibility."
"This is one of the reasons why I have my own ADSL line routed into my own server," said Pugh. "I have always assumed that GCHQ and the police have access to whatever is on the Commons systems and in principle it is also possible for anyone that works for PICTS to access information on the Dell systems in the Commons."