We'd hope not, but it's better to have a back-up... Especially one so low-tech and simple to provide- I can't imagine it would add a huge amount to the total cost of the units.
Indeed. I am sure the maker of the seats has a ticket holder as a pretty cheap option, so it won't break the bank. Retro fitting something like that would cost a whole lot more.
The majority of passengers won't have bikes nor oversized luggage.
It would probably make sense to ban such large bags on trains, rather than find ways to accommodate them, as it's quite amazing the sizes now available and the problems people have moving them around.
It's as if some people are worried about their house being burgled and decide to take everything with them instead.
These massive bags cause all sorts of problems inside and outside trains, on steps, escalators etc - so anything to discourage their usage (such as not being able to take it on a train, or being charged extra) would be good.
I appreciate that many people either won't have seen them, or won't think it's such a big deal - but if you just pop along to King's Cross/St Pancras you'll very quickly see for yourself.
Bikes on the other hand; we should be making more room for these to be stored, as well as areas for folded buggies.