What level of intent is required for the law of trespass?
The defendant needs to intent to do the act that constitutes the trespass (e.g. walking on to someone's land)
She does not need to intend to trespass (she does not need to know that her actions would constitute a trespass).
In other the act that constitutes a trespass must be voluntary.
League Againts Cruel Sports Ltd v Scott
Need voluntary act plus some kind of likelihood that a trespass will occur as a result.
Liable to trespass if:
1-) the intended to cause the hounds to enter such land OR
2-) his failure to exercise proper control over them caused them to enter such a land
Mayfair v Pears
Facts
Pears parked his car illegally in a private car parking. His car exploded for no apparent reason
The trespass was a causa sine qua non of unforeseeable damage to property
Other than the original trespass, the defendant was not at fault in anyway
Mayfair v Pears Cooke P considered the following factors
The damage was unintentional
Lack of negligence
The trespass not causing the fire (the causal link between the wrong and the harm is not immediate)
The damage being economic
It is customary to cover buildings with insurance (dont put as much weight on this)
Damage was not foreseeable
Considering all these factors, it would be unjust to impose liability on the defendant.
Mayfair v Pears
What is the latin phrase for the following 'cause without which it (the damage) would not have happened'
causa sine qua non
Mayfair v Pears
If the damage is causa sine qua non, the tortfeasor is not otherwise at fault which means that
the link between the damage and the trespass is not especially direct
Mayfair v Pears
means that the defendant who does not intend to cause damage may
perhaps not be liable for non-foreseeable damage following from his actions.
Trespassers will not be necessarily held liable for all damage that would not have occured but for the trespass-defendants should only be liable for the damage that is reasonably foreseeable
(but why should the owner bare the loss caused by someone who should not have been on his land?)
Definitive Rule
Trespassers should trespass on the property of others at their peril (liable for all the damages that ensue)