And interest rates go up 4% or more? Even more Yikes!

The UK mortgage scene is a whole lot more risky than in the USA. A 30 year mortgage with the interest rate fixed for the entire term of the loan? Unheard of. Typically you can get a 10 year fixed rate mortgage - and after that it goes to a variable rate for the remaining years of the loan. Most people who have a mortgage in the UK are on a variable rate. Heck, some people have interest-only mortgages - where they only pay the interest each month and after the end of the mortgage they still have to buy the property.

I see a few things happen... 1) people will lose their primary residences, 2) people who bought a secondary property to rent out will not afford payments and these will be sent back to the bank, 3) economy go down a fair bit as there's a lot of money around housing.

Despite the language of the first paragraph, this is in no sense a "prediction" of "what would happen if" Brexit went a different way.

It's a standard tool of central banks called a "stress test"... the "what would happen if" is really asking "what would happen to your bank if scenario X occurred"... then they design "X" to be worse than any reasonable prediction.

Most people who have a mortgage in the UK are on a variable rate.

The article directly contradicts that... and points out that qualifying for mortgages is based on a much higher rate than then-current to make sure that such shocks are not crippling. (Not a bad idea)

Two of the most powerful democracies on the planet walking toward the edge of a cliff. Compelled by the false mandate of a compromised vote in each case.

At least the UK has the means to reverse course. But will they?

It is not the prediction. What Carney said was that the UK banks had been stress-tested for awful events whatever the cause. Those things were what he said the system could withstand.

Starting at 2:25:00: https://www.bbc.co.uk/programmes/b0bcdf1t

"Wherever the shock comes from. It could come from China, it could come from abroad, it could come from a no deal Brexit."
...

I guess the clickbaity headline outweighed any swarm commitment to Brexit.

The Metro's a trashy freesheet, the sort you find left behind on a train seat. I don't think it should be a permissible source in LBN any more than the Mail is.