Just got a letter offering me £4,110 for the credit card, so am very happy that I am on Mumsnet 
Am spreading the word in real life too, several friends have been checking with their banks about previous loans and cards and have found that they too were paying ppi. Two of the friends were self-employed at the time and the other thought she had no option but to have ppi in order to get the loan. So they should all have a good claim. Certainly, for the sake of a couple of phone calls and a form, they are intending to try.
Another remembered that she used to have a M&S card years ago, and that too included ppi. She has been savvy enough in recent years to know she would not be covered or need it on recent loans, but had forgotten all about this aging card.
Everyone out there, if you have or had a loan, mortgage or Credit card, even if you no longer have the details, go on-line to the lenders web-site and follow the links to the ppi claims number. They must tell you if ppi was included. If it was, they will ask why you think it was mis-sold, even just "not knowing about it", or not thinking you had an option may well be enough reason.
Look at the links higher in this thread for more info. Don't hesitate to do this, or get nervous, there really is no need to use an outside agency to do this for you (and claim a large chunk of any settlement from you).
As I said before, if I managed to do it, then anyone can 