In my experience of requiring flexible working (for caring responsibilities rather than disability) it’s better to get a job offer and then start a conversation about flexible working options when deciding whether to accept the offer or not.
I would like to say that it should be ok given the fact this is part of their recruitment for disabled people but it seems too early in the process to me. At interview stage the question in the interviewer’s heads should be “is this the best candidate for this job” and not any additional questions about whether the practicalities of working hours/working location/conditions are going to be workable or not.