I have lived in RBS for years and haven’t seen any elderly ladies dressed untzniusly. I agree with emunah613 that it must be people visiting who don’t realize.
I remember years ago being on a bus and having one such visiting American zaidy sit next to me on the bus. It was probably the only time that a man sat next to me on the bus and I didn’t stand up because he so clearly was temimusdik and completely clueless and just didn’t realize that you don’t do that in EY.
btw, I think there may be LH on this thread and I’m not sure it should be continued but since it was bumped, I felt the need to clear the reputation of the elderly ladies in RBS.