Just a practical answer - I have 3 bank accounts - a spending account, a current account that just pays my mortgage and tax, and a savings account. Only the spe

Just a practical answer - I have 3 bank accounts - a spending account, a current account that just pays my mortgage and tax, and a savings account. Only the spending account has an app on my phone, and it only ever has a months spending in it so the amount that can be stolen is limited. In order to take my savings (quickly) a theif would also have to compromise the 'mortgage' current account as it is only set up to pay into that account. If my phone gets stolen, I expect the current account to be cleaned out with a 5K loss (2K balance + 3K max overdraft), and I'll lose access to anything with 2fa set up for a few days. That would suck a lot.