An estimated 300,000 visas giving foreigners the right to come to Britain may be wrongly approved every year, a committee of MPs has been told.
Linda Costelloe-Baker, the independent visa monitor, told the Home Affairs Committee it was "reasonable" to assume 15% of short-term approvals were wrong.
She also said officials were "under pressure" to issue - rather than reject - visas to meet productivity targets.
Tags: 300,000, UK, visas