Hi @Lillyloo, thanks for getting in touch. When we write to you to advise of an automatic credit limit increase then this would go ahead on the date mentioned in the letter. However, please bear in mind that this wouldn’t be guaranteed. If anything changes, or if the increase is due to be withdrawn, then we would usually write to you to let you know.
I’m afraid there isn’t an exact time-frame I can provide for this, however we’d usually write to you in advance of any changes. If you’d like to discuss your account specifically then please call our Credit Card team on 0345 300 4278 (24/7), and one of my colleagues can look into this further for you.