Really? that's interesting. What would they be likely to say, you think? Would they arrest a person for doing that or a caution/fine?
How about the following to consider:
Byelaw 10 Section 5
In the case of automatic closing doors, no person shall enter or leave by the door when it is closing.
Byelaw 11 Section 5
No person shall move, operate, obstruct, stop or in any other way interfere with any automatic closing door, train, or any other equipment on the railway:
Except in a emergency, by means of any equipment on or near which there is a notice indicating that it is intended to be used in a emergency.
Byelaw 24 Section 2
Any person who is reasonably believed by a authorised person to be in breach of any of these byelaws shall leave the railway immediately if asked to do so by a authorised person.
Any person who is reasonably believed by a authorised person to be in breach of any of these byelaws and who fails to desist or leave when asked to do so by an authorised person may be removed by an authorised person using reasonable force. This right of removal is in addition to the imposition of any penalty for the breach of these byelaws.
Authorised Person is:
A preson acting in the course of his duties who:
(a) is a employee or agent of a Operator, or
(b) any other person authorised by a Operator,
or any constable acting in the execution of his duties upon or in connection with the railway.
All that said, do you still think it's acceptable to delay trains/hold doors with your disruptive behaviour? I'm sure the majority of passengers being told why their train was late would be very happy with your selfish behaviour.
I hope the rail staff here find my post informative.