Yes, Jane Asher was in the original Brideshead; she played Charles Ryder's vapid wife, Celia. I should go back to the references upthread re: her other roles & try to see them -- have allowed Celia to define her for me, which isn't very fair.
I was always interested in her career because I knew her from my days as a Beatle fan. In addition to acting, she has also been a kind of Martha Stewart personality, with cookbooks and suchlike published. One thing I admire her for especially is that of all the people associated with the Beatles, she is virtually the one who never wrote a memoir about those years. She doesn't speak of them in interviews so far as I know. There's something noble in her reticence.