Santander UK's payment protection insurance (PPI) bill is expected to hit £836 million, as it adds an additional £20 million provision to cover further claims.

Sky News has reported that the bank is expected to confirm the amount in its full-year results later this week.

This would be the third time it has made a provision for PPI mis-selling, as Santander set aside £751 million in 2011 and £65 million in 2014.

Last week, the Financial Conduct Authority (FCA) said it would consider a time limit on PPI complaints as it reviews banks' treatment of the claims so far.