Critics warned the "worrying complacency" over our crisis-hit border system risks gravely undermining Britain's national security.
The report also reveals that passport checks are not carried out on everyone who arrives in the UK in private planes and ships at small airfields, harbours and marinas - leaving Britain vulnerable to criminals arriving here unhindered. Dismissing Government assertions that 100 per cent of passports were checked as "both imprecise and unrealistic", the PAC report said: "These numbers do not take any account of those that enter the country via land from the Republic of Ireland, or full account of those that travel via smaller craft known as general aviation or general maritime.
"The department told us that [it] makes a risk-based decision on whether to check passports or not."
It added: "The department does not estimate the percentage of unchecked passports to determine what risks these pose nor does it adequately measure the quality of the data it holds on individuals travelling to the UK and on those of interest to the UK government."
Meg Hillier, Labour chairman of the PAC, said: "If you collect information before people arrive the more chance you have to stop them entering the country in the first place.
"Successful completion of this project is essential to the security of our international borders. Yet the original target date has long passed and we are still at least three years away from delivery."
-Daily Mail