Chairman of the Commons Home Affairs Select Committee, Keith Vaz, says questions need to be answered about why personal data was illegally obtained by more than 100 firms and what the information was used for.
He said: "What did they do when they got this information? Some of the information we received on the committee showed that they were getting the most personal details from people. Why would they want all this information? I think that's the next stage."
More top news
Around 760 out of the 4,200 foreign offenders living freely in the UK have disappeared from sight, according to a leading watchdog.
Schools and nurseries are being called on to help check children have brushed their teeth.
Changes in gait could prove to be an early sign of Parkinson's disease, according to a new study.