Unfortunately, the credit referral agency used e.g. Equifax, may not have the correct information for you. Ask why your application was refused and which agency was used. You can then write to them and ask for more details. Pay your £2.50 and tell them you're invoking your right under the Data Protection Act to be supplied with all the information they have on you. When I applied for my first mortgage, it dragged on and on because Equifax insisted I wasn't on the Electoral Roll, despite the fact I had a hard-copy of my Electoral Roll entry from Stockport Council. I simply photocopied it, sent it to Equifax amd reminded them that they were legally obliged to correct their information. Needless to say, the mortgage then progressed.