Hi, had further correspondence with the club on this, here is Richard Hebberd's reply. Looks like there will be plenty of buses, instead of trains after the gig.
"Sally has forwarded your email to me.
The situation with the trains is that Southern and British Transport Police have decided that the station should be closed after the concert on safety grounds. On a match day we have nearly 40 extra carriages and two extra trains operating from Falmer Station. On the nights of the concert, Southern are unable logistically to provide these extra carriages because of commitments to the Derby and various Jubilee events. Without the extra carriages they would be unable to clear all those wishing to travel by train. This would leave a number of people still waiting at 12.30am without a train.
We are providing an extra 38 buses (including bendies) to take people back in Brighton after the concert. This has been discussed at length with the transport agencies, safety advisory group and promoters. We are leaving the stadium open after the concert finishes to allow people to wait for the first rush to clear. Brighton and Hove Buses estimate that they will be able to move all those wanting to get back to Brighton within the hour. We will also be running buses to Lewes.
Best Wishes
Richard"
Richard Hebberd
This still does not make total sense. Surely the existing scheduled trains are better than nothing?