The correct answers are: The marginal rate of tax; Timing; Qualifying charitable donations.
The marginal rate of tax - losses will be better used in years where the tax rate is higher.
Timing - it will be preferable to obtain relief in earlier years as this will result in a repayment of tax already paid.
Qualifying charitable donations - loss relief may lead to gift aid donations becoming wasted (as they cannot be carried forward - only group relieved (where appropriate) in the current period) in which case it may be better to use the loss in a year where they will not be wasted.
Companies do not have personal allowances.
Capital allowances may have increased the size of the loss but will not influence use of the loss.
