1.This section and Schedule increase the number of accounting periods in which a company can claim ring fence expenditure supplement (RFES) from 6 to 10. Losses, expenditure and supplement generated before 5 December 2013 will be excluded from supplement claimed under the additional 4 periods. This removes the need for the existing Extended Ring Fence Supplement and Schedule 11 abolishes this. This section and schedule will allow companies to maintain the value of their expenditure and losses for longer. These supplemented losses can then be carried forward to offset profits for corporation tax purposes. This will have effect in relation to accounting periods ending on or after 5 December 2013.