Negligence - Whether duty of cared owed - Whether breach of duty of care has occurred - Whether claim for 'pure economic loss' can be maintained in respect of torn of negligence - Detinue - Whether unlawful seizure of motor vehicle occurred - Wlements of tort of detinue - need to prove unequivocal demand - Need to prove unqualified refusal - Proof of special damages - Whether transport authority functions as a crown servant or agent - Party to be sued in claims wherein alleged tortfeasors allegedly functioning as a crown servant or agent when tort was committed.