How will this be affected by banning bikes from trains?
Well, quite.
Most of the arguments against bikes on trains are essentially "I dislike bikes, therefore I don't want them on trains, because I do like trains and them being there offends my eyes".
The solid arguments and easy answers are essentially:
1. It's a limited resource on some* trains -> compulsory reservation** and perhaps a small charge
2. It takes up places where people need to stand/sit -> bikes already aren't allowed on most peak trains so this is not an issue; they are mostly carried on trains that have the space anyway. In conjunction with (1), the railway knows full well which trains are always busy and can't be lengthened, so release 0 places on those
3. Some people block the doors with them -> well, some people block the doors with luggage, too. The solution there is for guards/OBSs (where not DOO, obviously) to insist they are moved to the correct place
* Not on most. Very, very rarely do I see a train with its full cycle capacity taken, even when that's only two. I can't remember the last time I did.
** This also essentially deals with the "angry person turning up unable to board the RRB" issue, as the number of places released on one would be 0, so people wouldn't plan and reserve a journey on one. For emergency RRB a bit of pragmatism is needed by both cyclist and railway to find a solution, e.g. allowing a normally non-Permitted route (including potentially cycling to a different station if able***), giving a free ticket to return and collect from the station another day, providing a taxi that will take the bike to get a stranded person home (but only on a return portion, not an outward one), etc.
*** As Permitted Routes are only relevant to walk-up tickets, this is another thing essentially fixed by single-fare pricing. If I can't travel with my bike, just refund the leg of the journey I can't make, and then I'll cycle to the other station of my choice and purchase one from there instead, much simpler. For seasons it might be easiest to treat failure to carry a cycle as a "100% Delay Repay" situation.