Claim: Leaving the EU would or could cut net migration by 100,000
Fact-check: Would net migration fall by 100,000 if the UK left the EU? - Full Fact
Verdict: nobody knows. it's an unofficial "ball park figure" for one possible exit scenario and the prediction depends on assumptions which might or might not come true.
Organisation: Full Fact
Author: Joseph O'Leary
Date published: 2016-01-28T00:00:00