You can easily book railways assistance either over the phone, or on-line up to about 48 hours before you travel. You will be sent an email giving the full information of your travel times, etc. They are very good, and will put your case onto the train for you and assist you up those steep steps on to (and off) the train. Usually, then have to register in when you get to the station, and should take a printed out copy of the email confirmation with you.
You seem to be quite fixated on Cornwall now, have you decided not to look at South Coast any further?
I am surprised at the comment about ground floor garden flats, obviously areas are very different. There were, and still are always a few around here available. Do not just rely on one individual agent in any area - they will only want you to see the properties they have on their books, keep checking on things like Rightmove, which list ALL the properties for purchase in the area.
Yes, you can get stair lifts for any shape stairs - can be quite pricey for curvy ones though. And, they need annual maintenance, etc. Not too keen on the idea stair lifts as a way of future proofing. Okay, if you are in a property that you really do not want to leave - but they do have several disadvantages.
At my last house, I always used to say, blithely, that I would be able to have a stairlift put in if my mobility reached that point. However, when it did, and I made enquiries I was not happy with the idea. Getting up stairs with my laundry basket of dry clothes was a weekly nightmare, would need to do that one stair at the time, placing basket down on each stair rung as I went, same if I was coming home with a suitcase. And stairlift would not have been any use for that.
I love it now, my washing basking goes on my little trolley to go from kitchen to spare room next door with wet washing, and then on same trolley over other side of hall to my bedroom with dry washing. Equally, any suitcases wheel into the lift here direct from my car, and then wheel directly into my flat and bedroom, no lifting involved.
Houses were fine when there were the children and I was younger, I am so very, very grateful and enjoying living on one level now. The other advantages to a flat (over, even a bungalow), is that I have no worries or concerns about any sort of outside maintenance , no roof, no gutterings, no drains, no pipes, no brickwork, no fences, etc. etc. Okay, I know I am considerably older than you Shandy, but I really do wish if I had done this several years back.
Will have a quiet day today, still feeling pretty exhausted from yesterday. One of the problems with aging (for me), is the fact that I always need something like 24-48 hours to recover from a day out - even though I do not do any driving on those days (except my mobility scooter). My next 'outing' is on Sunday, when we are off to meet my two youngest daughters and their three little primary school aged girls in a park about half way between them and us. Weather forecast is good - hopefully, it stays that way.