Sorry, but just to clear some misconceptions with the Barclays premier thing, and then it can all go back to being about RBS.
As of October 2022, the premier current account became available to all. Assuming you’re happy to pay a £20 monthly fee post grace period. Card collectors go nuts. There’s nothing on the form you need to lie about. It’s a one page thing. If after 12 months you don’t meet the criteria they’ll start charging you the fee.
You’re not doing anything wrong by applying for one, and you don’t need to lie about your income to get it. It is on the form, but should already be pre populated with your existing income anyway. So it’s easy to miss and applying is mostly just tapping a few buttons.
There was a big thing about it on head for points not that long ago so folks could maximise on the avios welcome offer.