Britain's Financial Conduct Authority says it has reached a deal with insurer Card Protection Plan, along with 13 banks and credit card issuers, to pay customers compensation of up to £1.3 billion pounds for mis-sold credit card insurance.National Australia Bank's Clydesdale Bank is among the banks involved."Seven million customers, who between them bought and renewed about 23 million policies, will soon receive a letter from CPP giving more information on the process," the Financial Conduct Authority said in a statement on Thursday."The involvement of the banks and credit card issuers reflects the fact that they introduced customers to CPP's products and so must share responsibility for putting things right."Reuters estimates compensation paid by banks to date for mis-selling payment protection insurance stands at in excess of £10 billion pounds.National Australia Bank said this week that it had raised further provisions for "conduct and redress matters" in the UK.These include provisions for mis-selling payment protection insurance, as well as for interest rate derivative products - another industry-wide problem in the UK.