Loses can be offset against profits from April 2017.
The chancellor announced that companies that incur losses on or after 1 April 2017 and carry them forward, will be able to use those loses against profits from other income streams or from other companies within a group.
Also, from 1 April 2017, the amount of profit that can be offset through losses carried forward will be restricted to 50% and this will only apply to profits in excess of £5m.
Article from ACCA In Practice