Cambridge day - NOT amateur radio

On Mondays I go into Cambridge on the bus for my University of the Third Age course. As I have an hour to kill after the course, I usually grab a bite to eat choosing different places most weeks. This week, I tried one place which was busy and ended up getting the £3 lunch deal (filled roll and drink) which was very good value at Subway. Sadly, because of my poor voice, the assistant treated me as if I was simple-minded: she spoke very slowly as if I was stupid. I found this very frustrating, but for many it must be far worse.  Never, ever, assume someone is stupid just because they have a disability.