European bank supervisors may discuss easing requirements for lenders to hold capital against sovereign debt this week as part of more than 30 meetings this month to track banks' progress in complying with updated requirements, two people with knowledge of the discussions said.

Regulators will meet this week at the European Banking Authority in London to review capital rules issued in December. National supervisors will probably discuss the so-called sovereign buffer, according to one of the people, a senior EU official who declined to be identified because the talks are private.

The EBA told banks to raise 114.7 billion euros ($150 billion) in fresh capital by the end of June as part of measures introduced to respond to the sharp fall in the value of securities issued by euro-area governments. The EBA required banks to keep a core Tier-1 capital ratio of 9 percent and hold additional reserves, called a sovereign buffer, against the debt of weaker euro-area countries, based upon the market price of the bonds.