Switching joint account from Santander 123

Hi all I set up our joint account for the mortgage, bills and all our general spending with Santander a while back before they increase the account fee and decreased the interest. I’m now thinking this longer makes me any money and will be best switch elsewhere. Where would you recommend me moving to? We don’t tend to keep more than we need to in this account as we are overpaying on the mortgage with any spare cash so we can roll in the H2B equity loan when we remortgage. I’ve been looking at the Clydesdale switch but not sure. I found a guide linked here on how to get that account bonus with a second account so I’m thinking to do that anyway but want the joint account to work as best as it can.