FTB09
Agree with Jalexas' comments
Two Questions
1. How quickly will my credit history be updated with the credit bureaus? About a month after statement.
2. Will this improve my credit score overnight? No, scores are gradually updated over a period of time.
It is good that you are being pro-active in sorting out your finances. However, I think you will need to continue this effort if you wish to avoid potential difficulties in the future. Loans and credit cards are not a bad thing, but you should keep these to a minimum. Having a £5k balance on your credit card shows that you like to spend more money than you earn. If you do that while you are paying back a mortgage, you need to think about the consequences. Debts can quickly spiral out of control. You need to think about setting a tough budget to stick to, which you keep under periodic review.
In regard to your current mortgage application, you should be aware that further credit checks will be carried out by the relevant mortgage centre. If the recent changes to your credit record could affect the success of your application, you should be ready to provide details of these recent changes if required. I have seen other posts where people have failed credit checks, after mortgage agreed in principle by mortgage advisor. If this happens, don't forget you can always appeal against the mortgage centres decision, by contacting them with the information.
I hope all goes well. Good luck.
Huckster