Because of where it has happened, and he sent one bloke sprawling on the railway tracks, the BTP will be involved, and there will probably be a charge of endangering railway safety thrown in. I reckon he'll get time.
Gosh we have accounting expertise on the takeover threads now CPS experts on here. How lucky are we!
I'm not a CPS expert, but I know exactly how the BTP deal with it and what charges they push the CPS for, and also what sort of sentencing gets handed out when a fight on a railway station ends up with someone on the track.
Depending on a few factors, we're either looking at (In descending order of potential sentences) ABH, Doing or omitting anything to endanger passengers by railway, or Common Assault.
The police will push for whatever is the most serious offence (and bear in mind he's clocked 4 different people, and there may be different offences for each person)
So for ABH, we'd need to know if he caused any injury. If there's no injury to anyone then it's not going to be ABH.
For the first guy, it could be endangering public safety. Not sure which station it is, it might be that that platform is disused, in which case it'd be difficult to prove that.
So it could just end up being common assault.
CPS will look at two things. First, do they have the evidence for
the charges that the police want to pursue? If it's ABH then there will need to be evidence of an injury. But I think there's clearly enough evidence for common assault. Secondly is it in the public interest? It clearly is in the public interest to charge people swinging their fists around.
Potentially four counts of common assault, sentences would probably be served concurrently. Six months max. I they can prove ABH it's up to 5 years, Doing or omitting anything to endanger passengers by railway, up to 2 years.
(I used to work for the police, albeit it was well over a decade ago now)