Hi Dazzy,
As Huckster has said, you need to check your credit file and with an IFA or lender that you can get a mortgage before going further with the house purchase and spending your money getting solicitors, valuations, mortgage application fees (though you will have to pay this to get the mortgage).
You may have to go to a non mainstream lender to get the funding.
Is there any reason for trying to buy right now when lending isn't easy and you may still have the default on your credit record?
Is it more cost effective than renting? What if the value of the property drops further, what about once you have taken into account any fees that are involved?
The market is not stable, and we don't know if we are really having a recovery, or if it is a false recovery before dropping further (I hope not).
Good luck
Sparky.