“A misdirection therefore occurs when the issues of fact, the case for the plaintiff or for the defence, or the law applicable to the issues raised are not fairly submitted for the consideration of the Jury. Where, however, the Judge sits without a Jury, he misdirects himself if he misconceives the issues, or summarises the evidence inadequately or incorrectly or makes a mistake of law, but provided there is some evidence to justify a finding it cannot properly be described as a misdirection.”