Step-free transit in London, UK

[Canuker]

This isn't a question, but it may help answer one that comes up a lot on CC.
Here is a map of the London subway ("tube") system that highlights stations - and routes - with step-free access between street and platform.
It may help travelers with heavy baggage, strollers, mobility issues, etc.
It takes a bit of studying, but a green blob indicates a station with at least some step-free access.
For example: passengers traveling to/from Southampton will likely transit through Victoria (by bus or train, map square D4) or Waterloo (train, map square D5) or Paddington (train, map square C3). All 3 tube routes through Victoria are step-free but only some are at Waterloo or Paddington, depending on which line you take, as shown.
The map also highlights stations where you can also switch tube lines step-free, within the station (white circles or black "=" signs ), without having to exit to the street.

[ldubs]

We used this map a couple years ago because one of our traveling companions was having knee issues.   Pretty handy and saved her some pain a few times.   

[Luv2cruz1000]

We use the tube when in London but be careful. We had our luggage and the train shut down and we had to carry it up several flights of stairs. When we managed to get out of the station we called uber. (I know this will upset the black cab drivers!) Double check your routes if mobility is a huge issue. We did have wonderful people who assisted me with my suitcase!

[tartanexile81]

We've used this too to get from Kings Cross St Pancras to Waterloo and as a result we certainly found an easier route than the one we'd used previously. However there was still a lot of walking and we found London taxis too frustrating to use so now we avoid London completely on our way to Southampton

[Cotswold Eagle]

3 hours ago, tartanexile81 said:

However there was still a lot of walking

Yes, ‘step-free’ doesn’t necessarily mean there aren’t lots of steps on a level!
 

The map is a great resource, but several regulars on this board can advise on the easy interchanges on the tube as opposed to long walks through passageways.