If you can see someone is visibly disabled and might appreciate a seat, please do ask.
I had the misfortune to be on a couple of sardine tin EMR trains on Saturday. The first was so spectacularly awful that after getting on at Leicester I bailed at Kettering (I had split tickets at Kettering so I was perfectly entitled to) A very kind gentleman travelling with his two children gave up his seat for me which I was very grateful for, but I was feeling incredibly anxious and uncomfortable as the train was so busy.
I wish I had stayed on that train for the train I got on was even worse. I ended up standing pretty much in the middle of the carriage from Kettering to London. The whole carriage could see me and my very visible purple and pink rhinestone studded crutch. I was constantly being knocked and shoved, and as I was nursing a brand new tattoo on my right arm it was pretty uncomfortable. By the time we got to London I was incredibly sore and stiff and it took me ages to hobble from the train to the platform. One man came up to me and said if he had seen me he would have given me his seat- but I was stood directly in front of him and he even pushed past me to go to the toilet!
Coming back the train was once again rammed with football fans and after fighting my way into yet another rammed carriage where I was seemingly invisible I turned around and a thoughtful person who was in such a hurry to get past tripped me up and I fell out of the doors. By this time I was crying and thankfully for me there was a lovely lady sat in the vestibule who caught me, took my bags and sat me on her seat while calming me down.
I realise that standing isn’t pleasant, especially on a very busy train, and I know all about invisible disabilities (mine are mostly invisible) but when it’s clear someone needs a seat, please at least offer. (I literally found out on the morning I travelled that I had to go so there was no time for booking a seat and if I could have avoided it I would, especially knowing every flipping football team in the vicinity of London were playing each other on Saturday!)