Hi you need to do a few things - I was in your situation in 2002 / 03 and am only now getting out of it. From what I have learned there are a few things you need to do -
1) Credit file
Get your credit files. apply to Experian, Equifax and Call credit. All are offering free trials right now and you can sign up, view your files and close the free trials. This way you know Who you owe money to, how much, the status of the accounts.
2) Remove the bad marks:
To get the defaults off your credit file there are 2 ways. 1) if the account is still open keep it open 3 years after the last default and it will get pushed off - they only keep 3 years of repayments. 2) if you have closed the accounts or they are defaulted and closed then it takes 6 years to disappear and option 1 is no longer available to you. However if you still owe money contact them or the debt company and see if they will take a settlement fee (usually about 30 /40% off the balance. If they do pay it and your account will show settled - then add a not of correction explaining what happened and how you fixed this - the credit agency will help you do this.
3) Register to vote - without this companies cant confirm your address so get on the electoral register
4) Get positive repayments on your file - if you have a credit card or loan that has not defaulted then paying it can put positive marks on your file
5) Stop applying for credit - to may applications look like you are desperate for credit and searches stay on your file for at least a year so only apply 6 months apart. -
6) Pre pay cards - if you cant get credit then consider cash plus as a pre pay card. You pay £15 for it and £5 per month BUT you then open a credit builder with them. It costs noting but the £5 a month you would already pay. After 3 months they report to the credit agency susses full repayments and after a year it looks like a loan has been repaid - all positive marks on your credit files. If you cant get anywhere I strongly suggest you look into Cash Plus but you must apply for the card then apply for the credit builder and do not miss a payment to them in a whole year. for £60 it makes a positive impact on your file and shows you can Handel credit.
7) Consider capital one or vanquis credit cards - making payments on credit cards on time leaves positive marks on your record - if you cant get a credit then do point 6 for a year as this will show an improved credit file-
8) Close any unused credit - in this financial credit crunch if you have a lot of unused credit you are a risk to companies as you could just run it up quickly and that makes you look an unacceptable risk - but if you have credit that you are not using then you dont need to apply for more.
Finally be aware of your credit ratings with all 3 agencies, Google 'who uses who' to see what companies use what agency to credit check. Don't apply if you have multiple accounts in default and try to live on cash while time passes and your old debts clear. I pay all 3 agencys every month so i can see exactly where i am and i now have a clear rating with no defaults on all 3.
I have been there and it took me 6 years before I could apply for credit sucssesfully and even then I had to get a card charging 40+% interest. I pay it off all the time and soon I am sure I will have a better rating in the next year.
oh the mistakes of youth
Good luck