In the case of
Fennelly vs Connex South Eastern (2000), a court found that a ticket inspector that punching a passenger was acting in the course of his duties and his employer was liable for his actions.
I fail to see why a court could ever reach a conclusion that, in respect of a Gateline Assistant giving permission to a passenger to be in a compulsory ticket area without a valid ticket, the passenger did not have permission to be in the compulsory ticket area as the gateline assistant had exceeded their authority.
You really cannot make the logical connection between these two situations that you are attempting to make, because the domain in which the agressive actions of the Ticket Inspector in Fennelly was considered, does not include any of the domain in which another Inspector might authorise a passsenger to enter a platform.
Fennelly was a case of the tort of
vicarious liability. A civil matter. A matter of strict liability. It was not a Criminal case, was not concerned with any details specific to the Railways or their tickets, and specifically did not involve any Railway legislation, Byelaws, Conditions or other documents.
Also, I believe that it is quite incorrect to claim that Buxton LJ concluded that "a ticket inspector ... punching a passenger was acting in the course of his duties.". What he did conclude was that the punch following some abuse from Fennelly, while not authorised by the employer, was an act which was not divorced from his employment :
The necklock sprang directly out of the altercation. The altercation was being conducted by Mr Sparrow on behalf of his employer, dealing as he thought appropriate with a passenger who was not reacting as the employer would have wished; it would not have occurred without Mr Sparrow's power to inspect tickets when he was on his employers' premises. It is difficult to say in any realistic terms that this was not all one incident.
The speculative example of an officer granting permission to a passenger could never be considered under the tort of
vicarious liability. What basis could there be for applying the strict liability of the tort in Fennely to making an employer liable for a civil remedy following their ticket inspector's actions having granted a permission?
Completely unhelpful to the discussion.