Out of the 67 step-free stations, only around half are step-free from the platform on to the train. The step-free access may be from a raised platform section, level with the floor of the train, or via a manual boarding ramp
All Underground staff have had disability equality training and should be able and willing to assist you.
If you have an assistance dog, staff will help you to avoid escalators where possible, or stop them to allow you and your dog to walk. However, this may not be possible at busy times.