Carney said if the UK crashed out of the European Union without a deal, a sharp rise in mortgage rates could torpedo the British housing market, according to reports tonight.
The governor was briefing ministers on the Bank’s preparation for what would happen if the UK left the EU without a Brexit deal next March.
Carney sketched out three scenarios, one in which a skeleton deal was agreed, one in which a few arrangements are made and one where the UK crashed out with no deal.
In the latter scenario he said sterling would tank, pushing up interest rates and inflation and causing mortgage companies to pass on higher risk premiums to homeowners.
Carney also warned that unemployment would rise and Britain would see more emigration than immigration for the first time since 1994.
He said the Bank would be unable to slash interest rates to reduce the impact of a no-deal as that would stimulate inflation.
Chancellor Philip Hammond also warned the cabinet that the UK would not be able to use tax cuts to boost the economy because of the impact a disorderly Brexit would have on the public finances.
The briefing came as Brexit secretary Dominic Raab stressed that he remains confident a deal will be struck, despite no-deal preparations.
The government warned today that UK driving licences may not be valid in the EU in the event of a no-deal Brexit.
HM Revenue & Customs today said it had written to 145,000 British firms to warn them of changes to cross-border trade in the event of no deal being reached.
That includes applying customs and excise rules to goods traded with the EU, in the same way that already applies to goods traded outside the EU.