Train Restrictions on Folding Bikes

Train companies in the south of England have banned carrying all bikes south of London during the London to Brighton charity bike ride, according to the BBC. While this has been railway company practice since 2004, this time it also includes folding bikes. Hopefully, any affected folding bike riders already know this, as 27,000 L2Bers will be riding to the seaside on Sunday 17th June.

Is there anything modern British train companies can do well?

EDIT: According to the Argus newspaper traffic near Brighton was gridlocked on Sunday, due to the motor vehicles needed to transport riders back to London.