I have just had new t&c's from Intelligent Finance informing me that they can pull monies from my offsetting pot (savings which help cancel out interest on your mortgage) to pay back any other IF account. I'm worried that they will take my savings to pay off the mortgage, but I need to have that pot of money to draw down on for a building project.

I want to move my savings, currently 50k, to a safe, instant access, high interest account. I see citibank came up top on the list, but my husband is concerned that, as they are a US bank, our money would not be protected if they went bust. Is this the case?

Citibank UK are indeed covered by the UK's FSCS compensation scheme in the same respect up to £50k per depositor.

I do believe that is doubled to £100k in the case of a joint account if that helps.