Life assurer Scottish Amicable has been fined £750,000 by the City watchdog for mis-selling endowment mortgages.

The Financial Services Authority said the group, which is owned by Prudential, failed to assess whether customers were prepared to take the risk their policy might not be large enough to pay off their mortgages when it matured.

It said the size of the fine reflected the "serious nature" of the firm's failings, including not acting adequately to guidance issued by the regulator in December 1999, which re-iterated the standards which must be met when the policies are sold.

The fine is the fourth largest issued by the authority since it took on its full powers in December 2001 and the third largest fine involving endowments.