"There is an obvious difference between cases tried
with a jury and cases tried by a judge alone.
Where the verdict is that of a jury, it will only
be set aside if the appellate court is satisfied
that the verdict on damages is such that it is out
of all proportion to the circumstances of the case:
Mechanical and General Inventions Co., Ld. v.
Austin [1935] A.C. 346. Where, however, the award
is that of the judge alone, the appeal is by way of
rehearing on damages as on all other issues, but as
there is generally so much room for individual
choice so that the assessment of damages is more
like an exercise of discretion than an ordinary act
of decision, the appellate court is particularly
slow to reverse the trial judge on a question of
the amount of damages. It is difficult to lay down
any precise rule which will cover all cases, but a
good general guide is given by Greer L.J. in Flint
v. Lovell (1935) 1 K.B. 354, 360. In effect the
court, before it interferes with an award of
damages, should be satisfied that the judge has
acted on a wrong principle of law, or has
misapprehended the facts, or has for these or other
reasons made a wholly erroneous estimate of the
damage suffered. It is not enough that there is a
balance of opinion or preference. The scale must
go down heavily against the figure attacked 1f the
appellate court is to interfere, whether on the
ground of excess or insufficiency."