Think lace dresses have bee pretty much done to death on the high street by now and have to be really special to be stylish. I'm afraid I don't think it's likely that that one is. Even those near or over 60 deserve stylish dresses, IMO!
I'm also afraid I don't like those ballet flats at all - look rather cheap and tacky.
Haven't been on one of my expeditions to the Marble Arch M and S for a couple of months but, from everything seen elsewhere, they still just don't seem to be getting it right. A shame.