Claim: An extension to the date of Brexit would cost £1 billion a month.
Fact-check: It's not true to say a Brexit extension would cost £1 billion - Full Fact
Verdict: wrong. an extension of a few months would cost no more than leaving with a deal in october 2019, which is still the government's publicly stated policy.
Organisation: Full Fact
Author: Tom Phillips
Date published: 2019-10-01T00:00:00